DIPRIONYL ESTERS ATTRACTIVE TO MALES OF THE DAILING PINE SAWFLY NEODIPRION DAILINGENSIS XIAO ET ZHOU (HYM., DIPRIONIDAE) IN NORTH-EASTERN CHINA

The attraction of male Neodiprion dailingensis Xiao et Zhou to pheromo ne substances identified from other Neodiprion species was tested in p lantations of Pinus tabulaeformis Carr. in Liaoning Province in north- eastern China. Both the acetate and propionate of (2S,3S,7S)-3,7-dimet hyl-2-pentadecanol (diprionol) were highly attractive. An addition of 10% of the (2S,3R,7R)-isomer did not significantly reduce the catch to the acetate. The (2S,3R,7R)-isomer was not attractive by itself This is the first pheromone study of a species belonging to the recently de scribed East Asian group of Neodiprion. The response of N. dailingensi s males is similar to that of N. sertifer males in eastern part of Asi a.