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Electroantennogram and behavioral responses of Tomicus minor (Hartig) (Coleoptera: Scolytidae) to plant volatiles.

WANG Hong-wei1, YANG Wei1**, YANG Hua1, YANG Chun-ping1, ZHU Xiao-qing1, LIU Feng-jian1, JIANG Li-hua2, SHAN Chun-yan2   

  1. (1Provincial Laboratory of Forest Conservation, Sichuan Agricultural University, Ya’an 625014, Sichuan, China; 2Forestry Bureau of Luding County, Luding 626100, Sichuan, China)
  • Online:2014-05-10 Published:2014-05-10

Abstract:

In order to screen out the effective compounds for preparation of attractants to trap female and male Tomicus minor (Hartig), the electroantennogram (EAG) and behavioral responses of female and male adults of T. minor to volatiles of its plant host, Pinus yunnanensis Franchet were tested. The results showed that all the 9 tested plant volatiles could induce the EAG responses at 10 g·L-1 compared with the control, and the EAG responses of the antennas caused by the different volatiles had significant differences (P<0.05). The female and male adults of T. minor exhibited strong EAG responses to (+)-α-pinene, (+)-limonene, (+)-3-carene, β-pinene and terpinolene; In the dose response tests, the EAG responses of female and male adults to (+)-α-pinene, (+)-limonene, (+)-3-carene and β-pinene intensified with the increasing concentration. When the concentration increased to 10 g·L-1, the EAG response was the strongest; however, the females and males showed the strongest EAG responses to terpinolene at the concentration of 1 g·L-1. Furthermore, T. minor showed no distinct directional behavior to the (+)-limonene; however, (+)-α-pinene, β-pinene, (+)-3-carene and terpinolene could obviously allure the females and males. The Duncan’s multiple range test for the behavioral response of females and males to the five plant volatiles showed that (+)-αpinene had the greatest attracting effect on females and males at 10 g·L-1 concentration. Our study provides a reference for developing attractive chemicals for T. minor in forests.
 

Key words: biogenic element, nutrient resorption, N and P balance, biogeochemical cycle., soil type