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Your Position :Home->Past Journals Catalog->2016年53 No.1

Behavioral response of Neoseiulus barkeri to carrizo citrange leavesdamaged by Panonychus citri and sucking insects
Author of the article:HU Jun-Hua1** WANG Xue-Lian2 ZHANG Yao-Hai1 YAO Ting-Shan1 LIU Hao-Qiang1 LI Hong-Jun1 RAN Chu
Author's Workplace:1. Citrus Research Institute, Southwest University, National Citrus Engineering Research Center, Scientific Observing and Experimental Station of Fruit Tree Science, Southwest Region, Ministry of Agriculture, Chongqing 400712, China; 2. College of Horticulture and Landscape Architecture, Southwest University, Chongqing 400712, China
Key Words:Neoseiulus barkeri, citrus volatile, behavioral response, Panonychus citri
Abstract:

[Objectives] To determine the olfactory response of Neoseiulus barkeri to volatiles released by citrus leaves that had been damaged by either Panonychus citri or piercing-sucking insects. [Methods] Common volatile compounds of citrus leave were qualitatively analyzed using GC-MS-liquid mass spectrometry. The relative retention index of each compound was determined and a library of the common citrus volatiles obtained constructed. In addition, volatiles from citrus leaves damaged by P. citri and sucking insects were collected and identified. Orientation responses of N. barkeri to volatiles were studied using a Y-tube olfactometer. [Results] Both the kinds, and the quantities, of volatiles from damaged leaves were notably different to those of the control. Furthermore, the volatiles from leaves damaged by P. citri were significantly different to those obtained from leaves damaged by sucking insects. Both kinds of damage induced citrus leaves to release α-pineine, α-phellandrene and p-cymene. Insect damage dramatically increased the quantities of some volatiles, including cis-πocimene, myrcene, limonene and terpineol, but reduced that of others, including 2-ethylalcohol and Undecane. N. barkeri was obviously attracted to caproaldehyde, nonanal, octyl acetate, heptaldehyde and myrcene at the concentrations tested (P>0.05). It was less attracted when n-octanol and 1-nonanol concentrations decreased. [Conclusion] N. barkeri have different behavioral responses to volatile components from citrus leaves damaged by P. citri compared to those damaged by piercingsucking insects. Chemical cues induced by the feeding activity of P. citri and piercingsucking insects play an important role in host selection and location by N. barkeri

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