SEMIOCHEMICALS FOR THE LACEWING CHRYSOPA CARNEA

C. Rikard UNELIUS-1, Elham AHMED-2, Anna-Karin BORG-KARLSON-1, and Jan PETTERSSSON-2
1- Department of Chemistry, Organic Chemistry Royal Institute of Technology, S-100 44 Stockholm, Sweden
2- Department of Entomology, Box 7044 Swedish Agricultural University, S-756 54 Uppsala, Sweden

Lacewings prey on aphids and other organisms and have been used in biological control of several insect pests in greenhouses, field crops and orchards.] Chrysopa cameo Stephens, in particular, has been utilized in many pest control programs. Both larvae and adults are active predators. Potential use of Chrysopidae and Hemeroblidae in integrated control is enhanced by their tolerance to some insecticides.

Literature studies indicate that these predators use iridoids in their olfactory communication. 2-4

We have studied the structure/activity correlations of some iridolactoles and related compounds i,l~ order to find a selective attractant for Chrysops.

Our aim is to contribute to better understanding of the ecological significance of these compounds and to search for their possible pheromonal function.

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2. Sakai, T., Nakajima, K. and Sakan, T. New monoterpene lactones of the iridane type from Actinidia polygama Miq. Bull. Chem. Soc. Jpn., 53, 3683-6 (1980).
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4. Hyeon, S. B., Isoe, S. and Sakan, T. The Structure Of Neomatatabiol the Potent Attractant For Chrysopa From Actinidia Polygama-D. Tetrahedron Lett., 51, 5325-5326 (1968).