Abstract: By using the Ytube olfactometer in the laboratory, the behavioral responses of Frankliniella occidentalis female adults were studied to kidney bean plants and 8 typical volatile chemicals induced by healthy plants (CK)， mechanical damage (MD), thrip nymph feeding (DFNF), thrip adult feeding (DFAF), exogenous jasmonic acid (JA) and methyl salicylate (MeSA). The results showed that F. occidentalis had different responses to kidney bean plants with different treatments. Compared to clean air (A), the kidney bean plant induced by JA and MeSA had stronger repellency to F. occidentalis, while F. occidentalis didn’〖KG-*9〗t show significant response to other treatments. F. occidentalis responded more significantlyto healthy plants (CK) and MD than to other treated plants, but the preference of F. occidentalis had no significant difference between CK and MD. Kidney bean plants induced by JA and MeSA had stronger repellency to F. occidentalis than other treated plants, and the effect of JA was less than MeSA. Among 8 standard chemical samples tested, (Z)3-Hexenol always showed a strong attraction to F. occidentalis at 5 concentration levels. α-Tetpinolene, 1-Octen-3-ol, (Z)-3-Hexenyl acetate and Isopentanol showed strong attractions to F. occidentalis just at certain concentrations. However, (Z)-3-Hexenal, Cyclopentanol and 3-methylButanal displayed repellency to F. occidentalis at 10^-1-10^-3, 10^-1-10^-4, 10^-4 μL·μL^-1 concentrations, respectively.

Key words: cotton, spatial and temporal distribution, trend analysis, fiber quality