The Taxis And Repel Responses Of Lygus Lucorum Meyer-Dur To Volatiles Of Host Plant

Lygus lucorum Meyer-Dur belongs to hemiptera miridae, the distribution is almost all over the country in China. Its host is rather widespread, and it does harm to a lot of crops such as cotton, beans, alfalfa and some kinds of fruit trees, etc. In recent years, so many Lygus lucorum occur , and have seriously effect on the fruit trees and crop production. In order to further explore the effective components of attraction and repellent to Lygus lucorum in the volatiles of the plant, and to screen the recipe of attractant and repellent to Lygus lucorum, thus preventing and controing Lygus lucorum in comprehensive pollution free way, we researched the volatiles of host plant of Lygus lucorum by the GC-MS and biometric method. Firstly we analysed and compared the ingredient of the volatiles of some host plants such as Gossypium spp., Medicago sativa, Glycine max, Dolichos lablabl, Vigna radiate, Solanum melongena, Capsicum frutescens and Phaseolus vulgaris and further explored the difference in the degree of different choices of Lygus lucorum to host plant. And then we analysed the volatiles of Glycine max and Zizyphus jujube damaged by Lygus lucorum and explored the sources of the material effective components of attraction and repellent to Lygus lucorum combined with the behavior determination of Lygus lucorum. Finally we screened the recipe of attractant and repellent to Lygus lucorum. The concrete results of the study are as follows:1.26 compounds were analysized by GC-MS in these host plants, mainly including alcohols, aldehydes, ketones, esters, terpenes, hydrocarbons and aromatic compounds. The highest content of compounds in Gossypium spp., Medicago sativa, Glycine max, Dolichos lablabl, Vigna radiate, Capsicum frutescens and Phaseolus vulgaris is Caprolactam, and the highest content of compounds in Solanum melongena is Ethylbenzene. The unique compounds in Glycine max is 2-Ethyl-1-hexanol; andβ- Pinene,β-Myrcene, and 1-Decyne is the unique compounds in Gossypium spp.; Hexanal, E-2-Hexenal, 1-Vinyl hexanol, 3-Octanone,β-Linalool, Cyclohexanol, 2,4-dimethyl-, andβ-Cyclocitral are the unique compounds in Medicago sativa; Cyclohexane, 2-ethenyl-1,1-dimethyl-3-methylene- is the unique compounds in Phaseolus vulgaris; Cyclohexane, 2,4-diisopropenyl-1-methyl-1- vinyl-, (1S, 2R, 4R)-(-)- is the unique compounds in Capsicum frutescens.2.The behavior determination shows that when the Population quantity is different, the behavior of the female Lygus lucorum is different. Glycine max harmed (26) has the stronger attraction to the female Lygus lucorum than the healthy plant, while Glycine max harmed (34) has the prominent repellent to the female Lygus lucorum. Zizyphus jujube harmed (30) has the prominent repellent to the female Lygus lucorum compared with the healthy plant and the air. Combine the analysis and comparison of the volatiles of the plant harmed, we found that L36 attract the female Lygus lucorum is derived from host plant (Glycine max and Zizyphus jujube). E93 and H26 repelling the female Lygus lucorum are root in host plant (Zizyphus jujube) and the Lygus lucorum itself.3.We screened out the recipe of the attractant and repellent to Lygus lucorum, the ingredient of the attractant is L36; the ingredient of the repellent are H26 and P10, the ratio is 34∶1. We also found that the mixture of different monomer compounds will produce synergy and antagonism effect compared with the monomer.