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cje ›› 2012, Vol. 31 ›› Issue (5): 1221-1224.

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(1Laboratory of Insect Ecology, South China Agricultural University, Guangzhou 510642, China; 2Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; 3Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, Hainan, China)

DING Qian1, LIAO Yong-lin1,2, WU Wei-jian1**, FU Yue-guan1,3   

  1. (1Laboratory of Insect Ecology, South China Agricultural University, Guangzhou 510642, China; 2Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China; 3Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, Hainan, China)
  • Online:2012-05-10 Published:2012-05-10

Abstract: The waxy spirals produced by female Aleurodicus dispersus during oviposition could be a chemical barrier against some herbivorous insects such as Stephanitis typica. In this paper, a laboratory leaf disc bioassay was conducted to study the antifeedant activities of aromatic esters, phenol, and hydrocarbon in the female A. dispersesecreted waxes against 5th-instar S. typica nymph. At concentration 10 mg·mL-1, the dibutyl phthalate in the secreted waxes had strong anntifeedant activity, followed by 3,5-bis (1,1-dimethylethyl)-4-hydroxy-benzenepropanoic acid methyl ester, di-n-octyl phthalate, and hexadecane, while 4,4′-methylenebis \[2,6-bis (1,1-dimethylethyl)\] phenol had no antifeedant activity. The antifeedant activity of dibutyl phthalate increased with its increasing concentrations, and the median antifeedant concentration against theS. typica was 0.929  mg·mL-1. The results implied that the aromatic esters
 from the waxy spirals exhibited significant antifeedant activity. These findings provided a new evidence for the interspecific interactions in phytophagous insects.

Key words: valley spruce-fir forest, carbon density, net primary production, net ecosystem production, decline.