Abstract:

“Y"-olfactometer and wind tunnel were used to study the selective behavior of the adults of Acantholyda posticalis to different trees. A. posticalis showed the highest preference to Pinus tabulaeformis and P. densiflora with the selection rate above 65% and the following are P. thunbergii and P. armandi with the selection rate above 60%, and this accords well with the factual occurrence of the wasp in forests. The preference of the adults to different colors shows significant difference, the selection tendency to green is evident (the selection rates of the female and male are 50% and 52% respectively) while the selection rates for yellow, red and pink are less than 20%. Different lights (red, yellow incandescence light, fluorescence light and natural light) have small influence on the selection of A. posticalis. The presence of female adults has great influence on the selection of male adults, and the male adults tend to select the trees on which the female adults exist.

Key words: Acantholyda posticalis, tree species, odor source, selection, &ldquo, Y", -olfactometer, wind tunnel