Prof. Dr. Monika Hilker


Freie Universität Berlin

Institute of Biology

Applied Zoology / Animal Ecology


Adresse Haderslebener Str. 9
12163 Berlin
Telefon +49 30 838-55913
Fax +49 30 838-53897

Academic degrees:

  • 1977: beginning to study biology and chemistry at the University of Göttingen, Germany
  • 1983: Diploma Biology at the University of Göttingen (Forest Zoology)
    Topic: Bark Beetles: Visual and Olfactory Orientation
  • 1983: Teacher Examination Chemistry at the University of Göttingen (Organic Chemistry)
  • 1986: PhD (Dr. rer. nat.) at the University of Göttingen (Biology)
    Topic: Oviposition Deterring Pheromones in Moths
  • 1993: Habilitation (Dr. habil.) at the University of Bayreuth, Germany (Zoology, Animal Ecology)
    Topic: Chemical Ecology of Juvenile Stages of Chrysomelidae

 Positions held:

  • 1983-1987: Research Assistant at the Institute of Forest Zoology, University Göttingen, Germany
  • 1987-1993: Assistant Professor (C1) at the Institute of Animal Ecology, University Bayreuth, Germany

  • 1993-1994: Assistant Professor (C2) at the Institute of Animal Ecology, University  Bayreuth, Germany

  • Since 1994: Full University Professor (C4) at the Institute of Biology, Applied Zoology / Animal Ecology, Freie Universität Berlin, Germany

 Academic activities and awards:

  • Awarded by Heisenberg fellowship (1993): no availment because of C2-professorship

  • Councillor International Society of Chemical Ecology (1994 – 1997)

  • FU Berlin, faculty board (Faculty Biology, Chemistry, Pharmacy) (1997 – 2001)

  • Deputy Managing Director of Institute of Zoology, FU Berlin (1997-1998)

  • Editorial board:

    • Basic and Applied Ecology (since 2000)

    • Chemoecology (since 2004)

    • Entomologia Experimentalis et Applicata (since 2004)

  • Guest editor: Basic and Applied Ecology, Special Issue "Induced Plant Responses to Herbivory", Vol. 4, 2003

  • Associate editor: Journal of Chemical Ecology (2004-2013)

  • Member of DFG senate: 2003 – 2009  (DFG = German Research Foundation)

  • of DFG senate committee for PhD Graduate Schools (2000 – 2006)

  • of DFG senate committee for Research Perspectives (2005 – 2009)

  • Berlin committee for promoting young researchers (NaFöG) (2000 – 2006)

  • Berlin committee for promoting women in science (KFN Frauenförderung, since 2005)

  • Visiting Scholarship, Ecology Department, Kyoto University, Japan (2006)

  • President (2010-2011) and Vice-president (2009-2010) of the International Society of Chemical Ecology

  • Speaker of the Collaborative Research Centre CRC (SFB) 973 (since 2012);

  • Member of Jury “Deutscher Umweltpreis” (since 2013)

Chemical communication among organisms is a fascinating research field. Which chemicals mediate interactions between organisms, how and where are these chemicals produced, how do organisms adapt to the enormous environmental variability and chemical diversity? A wide range of very different natural products is produced by both plants and insects. These organisms have evolved sophisticated biosynthetic pathways to produce information-conveying chemicals. Moreover, they have developed enormous receptor abilities to perceive infochemicals, and highly elaborated ways to transfer and integrate the information, thus resulting in beneficial physiological or behavioural responses.

In this context, my special interests focus on the “origin of insect life”, i.e., insect eggs. These highly vulnerable, immobile life stages need to cope with pathogens, predators and parasitoids. Chemoecological aspects of the intimate interactions between plants, eggs of herbivorous insects, and their enemies are studied in several current projects that address the following major topics:

  1. Defence of insect eggs against pathogens and parasitoids. Insect eggs can cope with natural enemies by highly effective “chemical weapons” which are in many cases endowed by the mother (or by both mother and father) to the eggs. However, little is known on defensive abilities of the embryo. We use chemical and molecular approaches in order to elucidate whether attack by natural enemies induces defensive or immune response by the embryo.
  2. Plant defence against insect eggs induced by egg deposition. Herbivorous insects often attach exocrine secretions to their eggs; these secretions glue the eggs onto a leaf or protect the eggs physically against enemies or unsuitable abiotic conditions. Such devices may backfire since secretions may “tell” a plant that herbivore attack has started (by egg deposition). The secretion can trigger “alert” responses by the plant which may change its volatile pattern so that egg parasitoids are attracted. Secretion associated with the eggs can also induce changes of the leaf surface chemistry; these changes in the leaf wax pattern inform parasitoids on the presence of eggs. Our research questions are: What are the defence-eliciting components in secretion associated with the eggs? How does the plant regulate the change of its volatile pattern? Which plant volatile compounds or which plant surface compounds inform egg parasitoids about the presence of eggs? These questions are currently studied in several tritrophic systems with various behavioural bioassays as well as chemical and molecular techniques.
  3. Plant defence against insect larvae primed by egg deposition. There is growing evidence that insect egg deposition “warns” a plant of future feeding damage by the hatching larvae. Larvae developing on a plant with prior egg deposition show worse performance than larvae starting their development on an egg-free plant. We are currently investigating by chemical and molecular methods how insect egg deposition primes plant defence against herbivore feeding damage.

The results of our studies may help understand the evolution of complex organismic interactions. Moreover, when we study forest and agricultural pest insects, knowledge of their “infochemical web” might be used for biological control strategies.


These are publications by Monika Hilker since 1995
(*: refereed)


  • * Bittner, N., Trauer-Kizilelma, U. & Hilker, M. (2017). Early plant defece against insect attack: involvement of reactive oxygen species in plant responses to insect egg deposition. Planta  245: 993-1007.

  • * Griese, E., Dicke, M., Hilker, M. & Fatouros, N.E. (2017). Plant response to butterfly eggs: inducibility, severity and success of egg-killing leaf necrosis depends on plant genotype and egg clustering. Sci. Rep. 7: 7316, doi: 10.1038/s41598-017-06704-z

  • * Mäntylä, E., Kleier, S., Kipper, S. & Hilker, M. (2017). The attraction of insectivorous tit species to herbivore-damaged Scots pines. J. Ornithol. 158: 479-491.


  • * Austel, N., Eilers, E.J., Meiners, T. & Hilker, M. (2016). Elm leaves “warned” by insect egg deposition reduce survival of hatching larvae by a shift in their quantitative leaf metabolite pattern. Plant, Cell & Environ. 39: 366-376.

  • * Bandoly, M., Grichnik, R., Hilker, M. & Steppuhn, A. (2016). Priming of anti-herbivore defence in Nicotiana attenuata by insect oviposition: Herbivore specific effects. Plant, Cell & Environment. 39: 848-859.

  • * Büchel, K., Fenning, T., Gershenzon, J., Hilker, M. & Meiners, T. (2016). Elm defence against herbivores and pathogens: Morphological, chemical and molecular regulation aspects. Phytochem. Rev. 15: 961-983.

  • * Eilers, E.J., Veit, D., Rillig, M.C., Hansson, B.S., Hilker, M. & Reinecke, A. (2016). Soil substrates affect responses of root feeding larvae to their hosts at multiple levels: orientation, locomotion and feeding. Basic Appl. Ecol. 17: 115-124.

  • * Firtzlaff, V., Oberländer, J., Geiselhardt, S., Hilker, M. & Kunze, R. (2016). Pre-exposure of Arabidopsis to the abiotic or biotic environmental stimuli ´chilling´ or ´insect eggs´ exhibits different transcriptomic responses to herbivory. Sci. Rep. 6: 28544.

  • * Fürstenau, B., Adler, C., Schulz, H. & Hilker, M. (2016). Host habitat volatiles enhance the olfactory response of the larval parasitoid Holepyris sylvanidis to specifically host-associated cues. Chem. Sens.  41: 611-621.

  • * Hilker, M. (2016). Früherkennung von Insektenbefall: Eiablagen mobilisieren die pflanzliche Verteidigung. In: Bayerische Akademie der Wissenschaften (Hrsg.): Die Sprache der Moleküle – Chemische Kommunikation in der Natur. Vol. 45. Rundgespräche Forum Ökologie, pp. 29-38. Verlag Pfeil, München.

  • * Hilker, M. & Fatouros, N.E. (2016). Resisting the onset of herbivory: plants perceive and respond to insect eggs. Curr. Opin. Plant Biol. 32: 9-16.

  • * Hilker, M., Schwachtje, J., Baier, M., Balazadeh, S., Bäurle, I., Geiselhardt, S., Hincha, D.K., Kunze, R., Mueller-Roeber, B., Rillig, M.C., Romeis, T., Schmülling, T., Steppuhn, A., van Dongen, J., Whitcomb, S.J., Wurst, S., Zuther, E. & Kopka, J. (2016). Priming and memory of stress responses in organisms lacking a nervous system. Biol. Rev. 91: 1118-1133.

  • * Otte, T., Hilker, M. & Geiselhardt, S. (2016). Phenotypic plasticity of mate recognition systems prevents sexual interference between two sympatric leaf beetle species. Evolution 70: 1819-1828.

  • * Sas, C., Müller, F., Kappel, C., Tyler, V.K., Wright, S.I., Hilker, M. & Lenhard, M. (2016). Repeated inactivation of the first committed enzyme underlies the loss of benzaldehyde emission after the selfing transition in Capsella. Curr. Biol. 26: 3313-3319.


  • * Austel, N., Reinecke, A., Björkman, C., Hilker, M. & Meiners, T. (2015). Phenotypic plasticity in a willow leaf beetle depends on host plant species: Release and recognition of beetle odors. Chem. Sens. 40: 109-124.

  • * Bandoly, M., Hilker, M. & Steppuhn, A. (2015). Oviposition by Spodoptera exigua on Nicotiana attenuata primes induced plant defence against larval herbivory. Plant J. 83: 661-672.

  • * Eilers, E.J., Pauls, G., Rillig, M.C., Hansson, B.S., Hilker, M. & Reinecke, A. (2015). Novel set-up for low-disturbance sampling of volatile and non-volatile compounds from plant roots. J. Chem. Ecol. 41: 253-266.

  • .* Geiselhardt, S., Hilker, M., Müller, F., Kozlov, M.V. & Zvereva, E. (2015). Inter- and intrapopulation variability in the composition of larval defensive secretions of willow-feeding populations of the leaf beetle Chrysomela lapponica. J. Chem. Ecol. 41: 276-286.

  • * Hilker, M. & Fatouros, N.E. (2015). Plant responses to insect egg deposition. Annu. Rev. Entomol. 60: 493-515.

  • * Otte, T., Hilker, M. & Geiselhardt, S. (2015). The effect of dietary fatty acids on the cuticular hydrocarbon phenotpye of an herbivorous insect and consequences for mate recognition. J. Chem. Ecol. 41: 32-43.

  • * Schmidt, W., Schulze, T.M., Brasse, G., Nagrodzka, E., Maczka, M., Zettel, J., Jones, P.G., Grunenberg, J., Hilker, M., Trauer-Kizilelma, Braun, U. & Schulz, S. (2015). Sigillin A, a unique polychlorinated arthropod deterrent from the snow flea Ceratophysella sigillata. Angew. Chem. 54: 7698-7702.

  • * Trauer-Kizilelma, U. & Hilker, M. (2015). Impact of transgenerational immune priming on the defence of insect eggs against parasitism. Dev. Comp. Immunol. 51: 126-133.

  • * Trauer-Kizilelma, U. & Hilker, M. (2015). Insect parents improve the anti-parasitic and anti-bacterial defence of their offspring by priming the expression of immune-relevant genes. Insect Biochem. Mol. Biol. 24: 91-99.

  • * Wäschke, N., Hancock, C., Hilker, M., Obermaier, E. & Meiners, T. (2015). Does vegetation complexity affect host plant chemistry, and thus multitrophic interactions, in a human-altered landscape? Oecologia 179: 281-292.


  • * Achatz, M., Morris, E.K., Müller, F., Hilker, M. & Rillig, M. (2014). Soil hypha mediated movement of allelochemicals: arbuscular mycorrhizae extend the bioactive zone of juglone. Funct. Ecol. 28: 1020-1029.

  • * Austel, N., Björkman, C., Hilker, M. & Meiners, T. (2014). Phenotypic plasticity in host plant preference of the willow leaf beetle Phratora vulgatissima: The impact of experience made by adults. Agric.Forest Entomol. 16: 417-425.

  • * Beyaert, I. & Hilker, M. (2014). Plant odour plumes as mediators of plant-insect interactions. Biol. Rev. 89: 68-81.

  • * Hilker, M. (2014). New synthesis: Parallels between biodiversity and chemodiversity. J. Chem. Ecol. 40: 225-226.

  • * Reinecke, A. & Hilker, M. (2014).  Plant semiochemicals – perception and behavioural responses by insects. Annu. Plant Rev. 47: 115 – 154. In: Insect – Plant Interactions. C. Voelckel & G. Jander (eds.). Wiley.

  • * Wäschke, N., Hardge, K., Hancock, C., Hilker, M., Obermaier, E. & Meiners, T. (2014). Habitats as complex odorous environments: How does plant diversity affect orientation of insects? PLoS ONE 9: e85152.


  • * Faucher, C.P., Hilker, M. & De Bruyne, M. (2013). Interactions of carbon dioxide and food odours in Drosophila: olfactory hedonics and sensory neuron properties. PLoS ONE 8: e56361.

  • * Geiselhardt, S., Yoneya, K., Blenn, B., Drechsler, N., Gershenzon, J., Kunze, R. & Hilker, M. (2013). Egg laying of Cabbage White Butterfly (Pieris brassicae) on Arabidopsis thaliana affects subsequent performance of the larvae. PLoS ONE 8: e59661.

  • * Hilker, M. (2013). Insekten als Schädlinge an Kulturpflanzen. In: Lehrbuch der Phytomedizin. H.-M. Poehling & J.-A. Verreet (eds). Ulmer, Stuttgart, pp. 324-342.

  • * Ott, S.C., Jenett-Siems, K., Siems, K., Müller, F., Hilker, M. & Eich, E. (2013). Ipvelutine, 7ß-Acetoxy-2α-(tigloyloxy)tropane, an unusual tropane alkaloid from Ipomoea velutina R. BR. (Convolvulaceae). Sci. Pharm. 81: 543-548.

  • * Trauer, U. & Hilker, M. (2013). Parental legacy in insects: Variation of transgenerational immune priming during offspring development. PLoS ONE 8: e63392.


  • * Beyaert, I., Köpke, D., Stiller, J., Hammerbacher, A., Yoneya, K., Schmidt, A., Gershenson, J. & Hilker, M. (2012). Can insect egg deposition „warn“ a plant of future feeding damage by herbivorous larvae? Proc. Roy. Soc. London, Ser. B 279: 101-108.

  • * Blenn, B., Bandoly, M., Küffner, A., Otte, T., Geiselhardt, S., Fatouros, N.E. & Hilker, M. (2012). Insect egg deposition induces indirect defense and epicuticular wax changes in Arabidopsis thaliana. J. Chem. Ecol. 38: 882-892.

  • * Büchel, K., McDowell, E., Nelson, W., Descour, A., Gershenzon, J., Hilker, M., Soderlund, C., Gang, D.R., Fenning, T. & Meiners, T. (2012). An elm EST database for identifying leaf beetle egg-induced defense genes. BMC Genomics 13:242.

  • * Eilers, E.J., Talarico, G., Hansson, B.S., Hilker, M. & Reinecke, A. (2012). Sensing the underground - ultrastructure and function of sensory organs in root feeding Melolontha melolontha (Coleoptera: Scarabaeinae) larvae. PLoS ONE 7: e41357.

  • * Geiselhardt, S., Otte, T. & Hilker, M. (2012). Looking for a similar partner: host plants shape mating preferences of herbivorous insects by altering their contact pheromones. Ecol. Lett. 15: 971-977.

  • * Schöning, C., Gisder, S., Geiselhardt, S., Kretschmann, I., Bienefeld, K., Hilker, M. & Genersch, E. (2012). Evidence for damage-dependent hygienic behaviour towards Varroa destructor-parasitised brood in the western honey bee Apis mellifera. J. Exp. Biol. 215: 264-271.


  • * Barto, E.K., Hilker, M., Müller, F., Mohney, B.K., Weidenhamer, J.D. & Rillig, M.C. (2011). The fungal fast lane: Common mycorrhizal networks extend bioactive zones of allelochemicals in soils. PLoS ONE 6: e27195.

  • * Büchel, K., Malskies, S., Mayer, M., Fenning, T.M., Gershenzon, J., Hilker, M. & Meiners, T. (2011). How plants give early herbivore alert: Volatile terpenoids attract parasitoids to egg-infested elms. Basic Appl. Ecol. 12: 403-412.

  • * Hilker, M. & Meiners, T. (2011). Plants and insect eggs: How do they affect each other? Phytochemistry 72: 1612-1623.


  • * Beyaert, I., Wäschke, N., Scholz, A., Varama, M., Reinecke, A. & Hilker, M. (2010). Relevance of resource-indicating key volatiles and habitat odour for insect orientation. Animal Behav. 79:1077-1086.

  • * Hilker, M. & Meiners, T. (2010). How do plants «notice» attack by herbivorous arthropods? Biol. Rev. 85: 267-280.

  • * Köpke, D., Beyaert, I., Gershenzon, J., Hilker, M. & Schmidt. A. (2010). Species-specific resonses of pine sesquiterpene synthases to sawfly oviposition. Phytochemistry 71: 909-917.

  • * Randlkofer, B., Obermaier, E., Hilker, M. & Meiners, T. (2010). Vegetation complexity - The influence of plant species diversity and plant structures on plant chemical complexity and arthropods. Basic Appl. Ecol. 11: 383-395.

  • * Zvereva, E.L., Kozlov, M.V. & Hilker, M. (2010). Evolutionary variations on a theme: host plant specialization in five geographical populations of the leaf beetle Chrysomela lapponica. Popul. Ecol. 52: 389-396.


  • * Fatouros, N.E., Pashalidou, F.G., Aponte Codero, W.V., van Loon, J.J.A., Mumm, R., Dicke, M., Hilker, M. & Huigens, M.E. (2009). Anti-aphrodisiac compounds of male butterflies increase the risk of egg parasitoid attack by inducing plant synonome production. J. Chem. Ecol. 35: 1372-1381.

  • * Geiselhardt, S., Otte, T. & Hilker, M. (2009). The role of cuticular hydrocarbons in male mating behavior of the Mustard leaf beetle, Phaedon cochleariae (F.). J. Chem. Ecol. 1162-1171.


  • * Abdel-latief, M. & Hilker, M. (2008). Innate immunity: eggs of Manduca sexta are able to respond to parasitism by Trichogramma evanescens. Insect Biochem. Mol. Biol. 38: 136-145.

  • * Fatouros, N.E., Broekgaarden, C., Bukovinszkine'Kiss, G., Van Loon, J.J.A., Mumm, R., Huigens, M.E., Dicke, M. & Hilker, M. (2008). Male-derived butterfly anti-aphrodisiac mediates induced indirect plant defense. Proc. Natl. Acad. Sci., USA 105: 10033-10038.

  • * Fatouros, N.E., Dicke, M., Mumm, R., Meiners, T. & Hilker, M. (2008). Foraging behavior of egg parasitoids exploiting chemical information. Behav. Ecol. 19: 677-685.

  • * Köpke, D., Schröder, R., Fischer, H.M., Gershenzon, J., Hilker, M. & Schmidt, A. (2008). Does egg deposition by herbivorous pine sawfly affect transcription of sesquiterpene synthases in pine? Planta 228: 427-438.

  • * Pankewitz, F. & Hilker, M. (2008). Polyketides in insects: ecological role of these widespread chemicals and evolutionary aspects of their biogenesis. Biol. Rev. 83: 209-226.

  • * Reinecke, A., Müller, F. & Hilker, M. (2008). Attractiveness of CO2 released by root respiration fades on the background of root exudates. Basic Appl. Ecol. 9: 568-576.

  • * Schröder, R. & Hilker, M. (2008). The relevance of background odor in resource location by insects: a behavioral approach. BioScience 58: 308-316.

  • * Schröder, R., Wurm, L., Varama, M., Meiners, T. & Hilker, M. (2008). Unusual mechanisms involved in learning of oviposition-induced host plant odours in an egg parasitoid? Animal Behav. 75: 1423-1430.


  • * Bünnige, M., Hilker, M. & Dobler, S. (2007). Convergent evolution of chemical defense in Galerucine larvae. Biol. J. Linn. Soc. 93: 165-175.

  • * Fatouros N.E., Bukovinszkine’Kiss, G., Dicke, M. & Hilker, M. (2007). The response specifity of Trichogramma egg parasitoids towards infochemicals during host location. J. Ins. Behav. 20: 53-65.

  • * Fernandez, P. & Hilker, M. (2007). Host plant location by Chrysomelidae. Basic Appl. Ecol. 8: 97-116.

  • * Fernandez, C.P., Meiners, T., Björkman, C. & Hilker, M. (2007). Behavioural and electrophysiological responses of the blue willow beetle Phratora vulgatissima to two different genotypes of Salix viminalis. Entomol. Exp. Appl. 125: 157-164.

  • * Gross, J., Fatouros, N.E., Neuvonen, S. & Hilker, M. (2007). The role of competitors for Chrysomela lapponica, a north Eurasian willow pest, in pioneering a new host plant. J. Pest Sci. 80: 139-143.

  • * Hilker, M. & McNeil, J. (2007). Chemical and behavioral ecology in insect parasitoids: how to behave optimally in a complex odorous environment. In: Behavioral Ecology of Insect Parasitoids, pp. 693-705. Wajnberg, E., Bernstein, C. & van Alphen, J. (eds.), Blackwell Publishing.

  • * Ott, S.C., Tofern-Reblin, B., Jenett-Siems, K., Siems, K., Müller, F., Hilker, M., Onegi, B., Witte, L. & Eich, E. (2007). Unusual tropane alkaloid pattern in two African convolvulaceous species. Z. Naturf. 62b: 285-288.

  • * Pankewitz, F., Zöllmer, A., Gräser, Y. & Hilker, M. (2007). Anthraquinones as defensive compounds in eggs of Galerucini leaf beetles: Biosynthesis by the beetles. Arch. Insect Biochem. Physiol. 66: 98-108.

  • * Pankewitz, F., Zöllmer, A., Hilker, M. & Gräser, Y. (2007). Presence of Wolbachia in insect eggs containing antimicrobially active anthraquinones. Microbial Ecol. 54: 713-721.

  • * Schröder, R., Cristescu, S.M., Harren, F.J.M. & Hilker, M. (2007). Reduction of ethylene emission from Scots pine induced by insect egg deposition. J. Exp. Bot. 58: 1835-1842.


  • * Bringmann, G., Noll, T.F., Gulder, T.A.M., Gruene, M., Dreyer, M., Wilde, C., Pankewitz, F., Hilker, M., Payne, G.D., Jones, A.L., Goodfellow, M. & Fiedler, H.P. (2006). Different polyketide folding modes converge to an identical molecular architecture. Nature Chem. Biol. 2: 429-433.

  • * Fatouros, N.E., Hilker, M., & Gross, J. (2006). Reproductive isolation between populations from Northern and Central Europe of the leaf beetle Chrysomela lapponica L.. Chemoecology 16: 241-251.

  • * Faucher, C., Forstreuter, M., Hilker, M. & De Bruyne, M. (2006). Behavioral response of Drosophila to biogenic levels of carbon dioxide depends on life stage, sex, and olfactory context. J. Exp. Biol. 209: 2739-2748.

  • * Hilker, M. & Meiners, T. (2006). Early herbivore alert: Insect eggs induce plant defense. J. Chem. Ecol. 32: 1379-1397.

  • * Mumm, R. & Hilker, M. (2006). Direct and indirect chemical defence of pine against folivorous insects. Trends Plant Science 11: 351-358.

  • * Pankewitz, F. & Hilker, M. (2006). Defensive components in insect eggs: Are anthraquinones produced during egg development. J. Chem. Ecol. 32: 2067-2072.

  • * Reinecke, A., Ruther, J. & Hilker, M. (2006). Precopulatory isolation in sympatric Melolontha species (Coleoptera, Scarabaeidae). Agric. Forest Entomol. 8: 289-293.

  • * Reinecke, A., Ruther, J., Mayer, C.J. & Hilker, M. (2006). Optimized trap lure for male Melolontha cockchafers. J. Appl. Entomol. 130: 171-176.


  • * Bünnige, M. & Hilker, M. (2005). Do “glanduliferous” larvae of Galerucinae (Coleoptera, Chrysomelidae) possess defensive glands? A SEM study. Zoomorphology 124: 111-119.

  • * Fatouros, N.E., Bukovinszkine Kiss, G., Kalkers, L.A., Soler Gamborena, R., Dicke, M. & Hilker, M. (2005). Plant synomone induced by butterfly eggs arrests Trichogramma wasps. Entomol. Exp. Appl. 115: 207-215.

  • * Fatouros, N.E., Huigens, M.E., Van Loon, J.J.A., Dicke, M. & Hilker, M. (2005). Chemical communication: butterfly anti-aphrodisiac lures parasitic wasps. Nature 433: 704.

  • * Hilker, M., Stein, C., Schröder, R., Varama, M. & Mumm, R. (2005). Insect egg deposition induces defence responses in Pinus sylvestris: characterisation of the elicitor. J. Exp. Biol. 208: 1849-1854.

  • * Jenett-Siems, K., Ott, S.C., Schimming, T., Siems, K., Müller, R., Hilker, M., Witte, L., Hartmann, T., Austin, D.F. & Eich, E. (2005). Ipangulines and minalobines, chemotaxonomic markers of the infrageneric Ipomoea taxon subgenus Quamoclit, section Mina. Phytochemistry 66: 223-231.

  • * Jenett-Siems, K., Weigl, R., Böhm, A., Mann, P., Tofern-Reblin, B., Ott, S.C., Ghomian, A., Kaloga, M., Siems, K., Witte, L., Hilker, M., Müller, F. & Eich, E. (2005). Chemotaxonomy of the pantropical genus Meremia (Convolvulaceae) based on the distribution of tropane alkaloids. Phytochemistry 66: 1448-1464.

  • * Meiners, T., Hacker, N., Anderson, P. & Hilker, M. (2005). Response of the elm leaf beetle to host plants induced by oviposition and feeding: The infestation rate matters. Entomol. Exp. Appl. 115: 171-177.

  • * Mumm, R. & Hilker, M. (2005). The significance of background odour for an egg parasitoid to detect plants with host eggs. Chem. Senses 30: 337-343.

  • * Mumm, R., Tiemann, T., Varama, M. & Hilker, M. (2005). Choosy egg parasitoids: Specificity of oviposition-induced pine volatiles exploited by an egg parasitoid of pine sawfly. Entomol. Exp. Appl. 115: 217-225.

  • * Reinecke, A., Ruther, J. & Hilker, M. (2005). Electrophysiological and behavioural response of Melolontha melolontha to saturated and unsaturated aliphatic alcohols. Entomol. Exp. Appl. 115: 33-40.

  • * Schröder, R., Forstreuter, M. & Hilker, M. (2005). A plant notices insect egg deposition and changes its rate of photosynthesis. Plant Physiol. 138: 470-477.

  • * Simon, M. & Hilker, M. (2005). Does rust infection of willow affect feeding and oviposition behavior of willow leaf beetles. J. Ins. Behav. 18: 115-129.


  • * Gross, J., Fatouros, N. & Hilker, M. (2004). The significance of bottom-up effects for host plant specialization in Chrysomela leaf beetles. Oikos 105: 368-376.

  • * Gross, J., Fatouros, N.E., Neuvonen, S. & Hilker, M. (2004). The importance of specialist natural enemies for Chrysomela lapponica in pioneering a new host plant. Ecol. Entomol. 29: 584-593.

  • * Gross, J., Schmolz, E. & Hilker, M. (2004). Thermal adaptations of the leaf beetle Chrysomela lapponica (Coleoptera: Chrysomelidae) to different climes of Central and Northern Europe. Environ. Entomol. 33: 799-806.

  • * Müller, C. & Hilker, M. (2004). Ecological relevance of fecal matter in Chrysomelidae. In: New Developments in the Biology of Chrysomelidae. Pp. 693-705. Jolivet, P., Santiago-Blay, J. and Schmitt, M. (eds.), SPB Academic Publishing, Amsterdam.

  • * Mumm, R., Tiemann, T., Schulz, S. & Hilker, M. (2004). Analysis of volatiles from black pine (Pinus nigra): significance of wounding and egg deposition by a herbivorous sawfly. Phytochemistry 65: 3221-3230.

  • Ruther, J., Reinecke, A. & Hilker, M. (2004). Mate finding in the forest cockchafer, Melolontha hippocastani Fabr., mediated by volatiles. Laimburg J. 1: 197-199.


  • * Dicke, M. & Hilker, M. (2003). Induced plant responses: from molecular to evolutionary biology. Basic Appl. Ecol. 4: 3-14.

  • Meiners, T. & Hilker, M. (2003). Chemical signalling between host plant and egg parasitoid of a galerucine leaf beetle. Proc. FISCB: 227-241.

  • Müller, C. & Hilker, M. (2003). The advantages and disadvantages of larval abdominal shields on the Chrysomelidae: mini-review. Proc. FISCB: 243-259.

  • * Mumm, R., Schrank, K., Wegener, R., Schulz, S. & Hilker, M. (2003). Chemical analysis of volatiles emitted by Pinus sylvestris after induction by insect oviposition. J. Chem. Ecol. 29: 1235-1252.

  • * Rostas, M. & Hilker, M. (2003). Indirect interactions between a phytopathogenic and an entomopathogenic fungus. Naturwissenschaften 90: 63-67.

  • * Rostas, M., Simon, M. & Hilker, M. (2003). Ecological cross-effects of induced plant responses towards herbivores and phytopathogenic fungi. Basic Appl. Ecol. 4: 43-62.

  • * Ruther, J. & Hilker, M. (2003). Attraction of forest cockchafer Melolontha hippocastani to (Z)-3-hexen-1-ol and 1,4-benzoquinone: application aspects. Entomol. Exp. Appl. 107: 141-147.

  • * Simon, M. & Hilker, M. (2003). Herbivores and pathogens on willow: do they affect each other? Agric. Forest Entomol. 5: 275-284.


  • Blum, M. & Hilker, M. (2002). Chemical protection of insect eggs against predators and parasitoids. In: Chemoecology of Insect Eggs and Egg Deposition. Pp. 61-90. Hilker, M. & Meiners, T. (eds.). Blackwell, Berlin.

  • * Gross, J., Podsiadlowski, L. & Hilker, M. (2002). Antimicrobial activity of exocrine glandular secretion of Chrysomela larvae. J. Chem. Ecol. 28: 317-332.

  • Hilker, M. (2002). Book review on: Chemical Information Transfer between Wounded and Unwounded Plants. Special issue in: Biochem. Syst. Ecol. 29: 979-113. (ed. By Marcel Dicke and Jan Bruin). Entomol. Exp. Appl. 101: 305-306.

  • * Hilker, M., Kobs, C., Varama, M. & Schrank, K. (2002). Insect egg deposition induces Pinus sylvestris to attract egg parasitoids. J. Exp. Biol. 205: 455-461.

  • * Hilker, M. & Meiners, T. (2002). Induction of plant responses towards oviposition and feeding of herbivorous arthropods: a comparison. Entomol. Exp. Appl. 104: 181-192.

  • Hilker, M. & Meiners, T. (2002). Chemoecology of Insect Eggs and Egg Deposition. Blackwell, Berlin. 376 pp.

  • Hilker, T., Rohfritsch, O. & Meiners, T. (2002). The plant´s response towards insect oviposition. In: Chemoecology of Insect Eggs and Egg Deposition. Pp. 205-234. Hilker, M. & Meiners, T. (eds.). Blackwell, Berlin.

  • Meiners, T. & Hilker, M. (2002). Plants’ defensive responses towards insect oviposition. IOBC Bulletin 25 (6): 165-168.

  • * Reinecke, A., Ruther, J., Tolasch, T., Francke, W. & Hilker, M. (2002). Alcoholism in Melolontha melolontha: role of plant alcohols for mate finding in the European forest cockchafer. Naturwissenschaften 89: 265-269.

  • * Reinecke, A., Ruther, J. & Hilker, M. (2002). The scent of food and defence: Green leaf volatiles and toluquinone as sex attractant mediate mate finding in the European cockchafer Melolontha melolontha. Ecol. Lett. 5: 257-263.

  • * Rostas, M., Bennett, R. & Hilker, M. (2002). Comparative physiological responses in Chinese cabbage induced by herbivory and fungal infection. J. Chem. Ecol. 28: 2449-2463.

  • * Rostas, M. & Hilker, M. (2002). Asymmetric plant-mediated cross effects between a herbivorous insect and a phytopathogenic fungus. Agric. Forest Entomol. 4: 223-231.

  • * Rostas, M. & Hilker, M. (2002). Feeding damage by larvae of the mustard leaf beetle deters conspecific females from oviposition and feeding. Entomol. Exp. Appl. 103: 267-27.

  • Ruther, J., Reinecke, A. & Hilker, M. (2002). Chemically mediated mate finding in Melolontha cockchafers. IOBC Bulletin 25: 15-20.

  • * Ruther, J., Reinecke, A. & Hilker, M. (2002). Plant volatiles in sexual communication of Melolontha hippocastani: response towards time-dependent bouquets and novel function of (Z)-3-hexen-1-ol as a sexual kairomone. Ecol. Entomol. 27: 76-83.

  • * Ruther, J., Reinecke, A., Tolasch, T. & Hilker, M. (2002). Phenol - another cockchafer attractant shared by Melolontha hippocastani Fabr. and M. melolontha L. Z. Naturf. 57c: 910-913.


  • * Müller, C. & Hilker, M. (2001). Host finding and oviposition behavior in a chrysomelid specialist - the importance of host plant surface waxes. J. Chem. Ecol. 27: 985-994.

  • * Ruther, J., Podsiadlowski, L. & Hilker, M. (2001). Quinones in cockchafers: additional function of a sex attractant as an antimicrobial agent. Chemoecology 11: 225-229.

  • * Ruther, J., Reinecke, A. & Hilker, M. (2001). Chemically mediated mate finding in the European forest cockchafer, Melolontha hippocastani FABR. (Coleoptera, Scarabaeidae). Mitt. Dtsch. Ges. Allg. Angew. Entomol. 13: 373-376.

  • * Ruther, J., Reinecke, A., Tolasch, T. & Hilker, M. (2001). Make love not war: a common arthropod defence compound as sex pheromone in the forest cockchafer Melolontha hippocastani. Oecologia 128: 44-47.

  • * Sears, A.L., Smiley, J.T., Müller, F., Hilker, M. & Rank, N.E. (2001). Nesting behavior and prey use in two geographically separated populations of the specialist wasp Symmoprhus cristatus (Vespidae: Eumenidae). Am. Midl. Nat. 145: 233-246.

  • * Wegener, R., Schulz, S., Meiners, T., Hadwich, K. & Hilker, M. (2001). Analysis of volatiles induced by oviposition of a phytophagous insect. J. Chem. Ecol. 27: 499-515.


  • * Hilker, M., Bläske, V., Kobs, C. & Dippel, C. (2000). Kairomonal effects of sawfly sex pheromones on egg parasitoids. J. Chem. Ecol. 26: 221-231.

  • * Meiners, T. & Hilker, M. (2000). Induction of plant synomones by oviposition of a phytophagous insect. J. Chem. Ecol. 26: 221-232.

  • * Meiners, T., Westerhaus, C. & Hilker, M. (2000). Specificity of chemical cues used by a specialist egg parasitoid during host location. Entomol. Exp. Appl. 95: 151-159.

  • * Müller, C. & Hilker, M. (2000). The effect of a green leaf volatile on host plant finding by larvae of a herbivorous insect. Naturwissenschaften 87: 216-219.

  • Ruther, J. Reinecke, A. & Hilker, M. (2000). Die Rolle von Wirtspflanzendüften und Sexualpheromonen in der Partnerfindungsstrategie des Waldmaikäfers, Melolontha hippocastani. Mitt. Biol. Bundesanst. Land. Forstw. 376: 251-252.

  • * Ruther, J., Reinecke, A., Thiemann, K., Tolasch, T., Francke, W. & Hilker, M. (2000). Mate finding in the forest chockchafer, Melolontha hippocastani, mediated by volatiles from plants and females. Physiol. Entomol. 25: 172-179.


  • * Bünnige, M. & Hilker, M. (1999). Larval exocrine glands in the galerucine Agelastica alni L. (Coleoptera: Chrysomelidae): their morphology and possible functions. Chemoecology 9: 55-62.

  • * Dautel, H., Kahl O., Siems, K., Oppenrieder, M., Müller-Kuhrt, L. & Hilker, M. (1999). A novel test system for the detection of tick repellents. Entomol. Exp. Appl. 91: 431-441.

  • Meiners, T. & Hilker, M. (1999). Chemical cues mediating interactions between chrysomelids and parasitoids. In: Advances in Chrysomelidae Biology. M.L. Cox (ed.). pp. 197-216.

  • * Müller, C. & Hilker, M. (1999). Reactions of the ant Myrmica rubra towards tansy-feeding Cassida larvae (Coleoptea, Chrysomelidae). Oecologia 118: 166-172.


  • * Dippel, C. & Hilker, M. (1998). Effects of physical and chemical signals on host foraging behavior of Drino inconspicua (Diptera, Tachinidae), a generalist parasitoid. Environ. Entomol. 27: 682-687.

  • * Gross, J., Müller, C., Vilcinskas, A. & Hilker, M. (1998). Antimicrobial activity of exocrine glandular secretions, hemolymph and larval regurgitate of the mustard leaf beetle Phaedon cochleariae. J. Invert. Pathol. 72: 296-303.

  • * Rostas, M., Dippel, C. & Hilker, M. (1998). Infochemicals influencing the host foraging behaviour of Dahlbominus fuscipennis, a pupal parasitoid of the European spruce sawfly Gilpinia hercyniae. Entomol. Exp. Appl. 86: 221-227.

  • * Ruther, J. & Hilker, M. (1998). A versatile method for on-line analysis of volatile compounds from living samples. J. Chem. Ecol. 24: 525-534.


  • * Meiners, T. & Hilker, M. (1997). Host location in Oomyzus gallerucae (Hymenoptera: Eulophidae), an egg parasitoid of the elm leaf beetle Xanthogaleruca luteola (Coleoptera, Chrysomelidae). Oecologia 112: 87-93.

  • * Meiners, T., Köpf, A., Stein, C. & Hilker, M. (1997). Chemical signals mediating interactions between Galeruca tanaceti L. (Coleoptera, Chrysomelidae) and its egg parasitoid Oomyzus galerucivorus (Hedqvits) (Hymenoptera, Eulophidae). J. Ins. Behav. 10: 523-539.

  • * Rostas, M., Dippel, C. & Hilker, M. (1997). Zur Bedeutung chemischer und physikalischer Signale bei der Parasitierung von Kokons der Buschhornblattwespe Gilpinia hercyniae (Hym., Diprionidae) durch die Erzwespe Dahlbominus fuscipennis (Hym., Eulophidae). Mitt. Dtsch. Ges. Allg. Angew. Entomol.11: 537-540.

  • * Schulz, S., Gross, J. & Hilker, M. (1997). Origin of the defensive secretion of the leaf beetle Chrysomela lapponica. Tetrahedron 53: 9203-9212.

  • * Weingärtner, M., Schindek, R. & Hilker, M. (1997). Intraspezifische Interaktionen zwischen Larven und Imagines des Blattkäfers Gastrophysa viridula (Coleoptera, Chrysomelidae). Mitt. Dtsch. Ges. Allg. Angew. Entomol. 11: 491-494.


  • Hilker, M. (1996). Chemisch-ökologische Untersuchungen an Blattkäfern. Berichte der Naturforsch. Freunde Berlin 35: 77-96.

  • * Schindek, R. & Hilker, M. (1996). Influence of larvae of Gastrophysa viridula (Coleoptera, Chrysomelidae) on the distribution of conspecific adults in the field. Ecol. Entomol. 21: 370-376.


  • * Anderson, P., Hilker, M. & Löfqvist, J. (1995). Larval diet and its influence on oviposition behaviour in Spodoptera littoralis. Entomol. Exp. Appl. 74: 71-82.

  • * Gross, J. & Hilker, M. (1994/1995). Chemoecological studies of the exocrine glandular larval secretions of two chrysomelid species: Phaedon cochleariae and Chrysomela lapponica. Chemoecology 5/6, 3/4: 185-189.

  • * Hilker, M. (1995). Chemisch-ökologische Aspekte von Interaktionen zwischen den drei trophischen Ebenen Wirtspflanze - phytophages Insekt - Prädator bzw. Parasitoid. Mitt. Dtsch. Ges. Allg. Angew. Entomol. 10: 673-679.

  • * Hilker, M. & Köpf, A. (1995). Evaluation of the palatability of chrysomelid larvae containing anthraquinones to birds. Oecologia 100: 421-429.