CHEMICAL ECOLOGY OF ASTIGMATID MITES .35. AGGREGATION PHEROMONE AND KAIROMONE ACTIVITY OF LARDOLURE AND ITS ANALOGS AGAINST LARDOGLYPHUS-KONOI AND CARPOGLYPHUS-LACTIS

The natural 1R,3R,5R,7R-1,3,5,7-tetramethyldecyl formate, lardolure (1 ) was the only active compound (activity at 10 ppm) among 18 synthesiz ed analogues to Lardoglyphus konoi as an aggregation pheromone. On the other hand, Carpoglyphus lactis indicated a broad spectrum of activit y as a kairomone to nine compounds at 1,000 ppm or less concentration, among which lardolure (1, active at 1 ppm) was the most active. Chang es of the main carbon skeleton with 1R,3R,5R,7R-asymmetric carbon moie ty from n-decyl to n-nonyl, and of functional groups from formate to a lcohol, acid, acid-ester and aldehyde did not significantly decrease k airomonal activity. However, changes from formate to chloride, amine, phosphonic acid ester or higher alkoxycarbonyl groups did not result i n any activity.