OPTIMIZATION OF MALE SEX ATTRACTANTS FOR ORTHOSIA-CRUDA SCHIFF, O-MUNDA SCHIFF AND O-STABILIS SCHIFF (LEP, NOCTUIDAE)

Synthetic male sex attractants have been optimized for 3 Orthosia spec ies, all of them potential orchard pests. To detect the occurence of t hese species, baits consisting of a dose of 1000 mug of a 20:1 mixture of (Z)-11-hexadecen-1-ol and (Z)-11-hexadecenal; of 1000 mug of a 100 :1 mixture of (Z)-11-hexadecenal and (Z)-9-tetradecenal; and of a dose of 1000-100 mug of a 20:1 mixture of (Z)-11-hexadecenyl acetate an (Z )-9-tetradecenyl acetate are recommended for O. munda, O. stabilis and O. cruda, respectively.