Abstract
In observation-cage experiments some new contact kairomones for the egg parasiteTrichogramma evanescens Westwood are demonstrated.T. evanescens females search significantly longer on cabbage leaves treated with the wing scales of two hosts,Pieris brassicae L. andP. rapae L. Further, egg washes ofP. brassicae containing an oviposition deterrent pheromone for the butterflies, were found to have a contact-kairomonal effect on the parasite.T. evanescens females search significantly longer on cabbage leaves sprayed with a methanol or water wash ofP. brassicae eggs than on leaves treated with the solvent only.
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Hymenoptera: Trichogrammatidae.
Lepidoptera: Pieridae.
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Noldus, L.P.J.J., van Lenthren, J.C. Kairomones for the egg parasiteTrichogramma evanescens Westwood. J Chem Ecol 11, 793–800 (1985). https://doi.org/10.1007/BF00988306
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DOI: https://doi.org/10.1007/BF00988306