Method for trapping encarsia formosa to restrain tea aphids

Abstract

The invention provides a method for trapping encarsia formosa to restrain tea aphids. Trans-2-hexenal, methyl salicylate, trans-2-pentenal, cis-jasmone and beta-ionone are prepared into solutions withthe concentratin of 10<-2> g / mL-10<-6> g / mL respectively, then the five solutions are mixed in the proportion of 1:(1-2):(1-2):(1-2):(1-2) to prepare an encarsia formosa trapping agent, and the encarsia formosa trapping agent is dripped onto wool felt to prepare trapping cores. The volume of each trapping core is 25*10*10 mm<3>, and the total mass of the five contained compounds is 10-15 mg. Important tea tree pests, namely the tea aphids, cause severe damage from mid April to mid May and from the first ten days of September to the first ten days of November every year, and two population peaks are formed in the two periods respectively. The trapping cores are hung in tea bushes suffering from the tea aphids 10-20 days before each peak comes, and the trapping cores are hung when the number of tea shoots suffering from aphid damage is larger than 5-10 every one square meter. Encarsia formosa parasitic tea aphid nymph is trapped to reduce or eliminate consumption of chemical pesticidesto prevent the aphids.

Description

technical field [0001] The invention belongs to the field of plant protection, and relates to placing lure cores loaded with an aphid wasp attractant in the tea garden during the serious damage of the important pest tea aphid in the tea garden to trap the aphid wasp to parasitize the tea aphid. Background technique [0002] The tea aphid Toxoptera aurantii Boyer is one of the important pests widely distributed in the tea regions of China. In East China, 25-35 generations are bred in one year. It occurs from mid-April to mid-May, and from early September to early November. Hundreds of adults, nymphs and eggs of the tea aphid gather on a tea branch in the tea garden. Adult aphids and nymphs suck the juice of young leaves, buds and even stems, excrete a large amount of "honeydew" on the lower leaves, breed tea coal disease, affect the photosynthesis of tea trees, and cause tea yield reduction. The tea leaves made from aphid-infested tea shoots have deteriorated taste, soft ap...

AI Technical Summary

Problems solved by technology

Aphids are so serious, but chemical pesticides cannot be used to control aphids

The reason is that the tea aphid tends to be tender and damages, and gathers on the tea shoots, and the application of pesticides will cause the tea leaves to exceed the standard

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