Abstract: In order to screen attractive chemicals for trapping male and female Dendroctonus armandi, electroantennography and Y-tube olfactometer were used to test the electroantennographic (EAG) and behavioral responses of D. armandi adults to the main components of the volatiles from Pinus armandii. At the dosages 0.01, 0.1, 1, 10, and 100 μg, seven test chemicals at their proper dosages all induced clear EAG responses. At the dosage 10 μg, myrcene, (+)-3-carene, and β-caryophyllene all elicited the highest EAG values to both the female and the male D. armandi adults, and (+)-α-pinene and limonene elicited the highest EAG values to the male D. armandi adults. Also at the dosage 10 μg, (+)-α-pinene, β-pinene, and (+)-3-carene induced an obvious correct taxis response of the females, with the correct response percentages of the females being significantly higher (>72%) than those of the males. At the dosage 1 μg, only (+)-3-carene was attractive to the males. At the dosage 100 μg, (-)-α-pinene had definite repellent effect to the female and male D. armandi adults. This study could provide a basis for developing attractive chemicals to the D. armandi in P. armandii forest.

Key words: Remote sensing, Soil vegetation atmosphere transfer, Sensible heat flux, Latent heat flux, Evapotranspiration