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Method for luring Chrysopa sinica Tjeder to restrict Toxoptera aurantii Boyer by pheromones

A Chinese lacewing and pheromone technology, applied in the direction of chemicals for biological control, botanical equipment and methods, applications, etc., to reduce pollution, reduce usage, and protect biodiversity

Active Publication Date: 2014-06-18
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pheromones are all derived from the tea shoots of Longjing 43 variety in spring. Previous experiments were done indoors. It is not yet known whether these semiotic substances can effectively regulate the behavior of Chinese lacewings in tea gardens?

Method used

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  • Method for luring Chrysopa sinica Tjeder to restrict Toxoptera aurantii Boyer by pheromones
  • Method for luring Chrysopa sinica Tjeder to restrict Toxoptera aurantii Boyer by pheromones
  • Method for luring Chrysopa sinica Tjeder to restrict Toxoptera aurantii Boyer by pheromones

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1. Using the headspace dynamic adsorption method to absorb the volatiles of tea shoots caused by tea aphids, rinse them with organic solvents, and identify more than 20 components by gas-mass spectrometry with standard samples, and also found α-farnesene , benzaldehyde and (trans)-2-pentenal are abundant.

[0017] 2. These more than 20 kinds of compounds and aphid sex pheromone components nepetalactone and nepetalin were respectively formulated into 10 -6 g / ml~10 -1 g / ml of the taste source, the antennae electrophysiology test was carried out with the Chinese lacewing as the test insect, and it was found that nepetalinol, nepetalactone, α-farnesene, benzaldehyde and (E)-2-pentenal caused Chinese lacewing EAG responded strongly.

[0018] 3. Mix nepetalactone and nepetalactone into a series of compounds in a certain ratio, and mix benzaldehyde, α-farnesene and nepetalin into a flavor source in a ratio of 1-2:2-3:5-7, Respectively (cis)-3-hexen-1-ol, (trans)-2-pentenal,...

Embodiment 2

[0021] The first step is the separation and identification of volatiles from tea shoots caused by tea aphids.

[0022] 1. Materials and methods:

[0023] The tea garden for testing is located in Meijiawu Village, Hangzhou City, Zhejiang Province. The tea tree variety is Longjing Changye Camellia sinensis cv. Longjingchangye, which is 20 years old.

[0024] Aphid damage to tea shoots: Before the experiment, the artificially raised wingless tea aphids were starved for 1 hour, and then 1000 tea aphids were placed on 6 healthy tea shoots of a tea tree in Longjing Changye in the experimental tea garden, and the tea leaves were covered with gauze. Cover it (to prevent the tea aphid from escaping), and after 24 hours, use a small brush to gently brush off the tea aphid and its honeydew on the tea tip, cut out these 6 tea tips with one bud and six leaf aphid, and weigh them, with a total mass of 15.5 g, Moisturize the base of the tea tip with absorbent cotton soaked in distilled wate...

Embodiment 3

[0051] Example 3 Experiment of trapping Central China lacewings in autumn and restricting tea aphids in spring of the following year in southern Anhui tea area

[0052] 1. Materials and methods

[0053] On October 31, 2012, Jingting Mountain Tea Plantation, Anhui Province, 0.5hm 2 In the pollution-free tea garden, place lures of Chinese lacewing traps at a distance of 8m×8m, and hang the lures on the tea shoots. Choose another piece of 0.5hm 2 The pollution-free tea garden is used as CK, and no lures are placed. In each tea garden, 10 sample plots were selected by parallel jumping method, and each sample plot was a 10-meter tea row, and the number of aphid tea shoots was recorded. On March 10, 2013, the same method was used to investigate the number of tea shoots with tea aphids.

[0054] 2. Results and analysis

[0055] At the end of October, the number of Chinese lacewings is large, and they can be lured around the aphids in the tea garden to prey on the tea aphids dire...

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Abstract

The invention provides a method for luring Chrysopa sinica Tjeder to restrict Toxoptera aurantii Boyer by synomone from tea shoots and aphid sex pheromones. According to the invention, the synomone from tea shoots and the aphid sex pheromones are taken as basic components to prepare a Chrysopa sinica Tjeder trapping agent, which is used to lure the Chrysopa sinica Tjeder to trap an important injurious insect, Toxoptera aurantii Boyer, of the buds and leaves of tea trees, and used chemical pesticides can be reduced and even avoided so as to alleviate the pollution. The Chrysopa sinica Tjeder is the dominant species natural enemy of the Toxoptera aurantii Boyer, and by using the trapping agent to lure and guide the Chrysopa sinica Tjeder to restrict the Toxoptera aurantii Boyer, the predation efficiency can be improved, and the potency can be protected and utilized. The method provided by the invention protects the biodiversity, uses the pheromone substances to lure the important natural enemy, Chrysopa sinica Tjeder, to trap the Toxoptera aurantii Boyer effectively in a tea garden, protects and utilizes the natural enemy resources, and is simple and convenient to implement and low in cost.

Description

technical field [0001] The invention belongs to the field of plant protection, and relates to a method for using pheromone to lure Chinese lacewings and control tea aphids. Background technique [0002] The area of ​​tea gardens in my country has reached 2.4 million hm 2 , accounting for slightly more than half of the world's tea garden area. The tea aphid, Toxoptera aurantii Boyer, is widely distributed in tea areas. It pricks and sucks the young shoots of tea trees, causing the buds to bend, the leaves to curl, and the composition of tea shoot contents to change. For example, in the Anji white tea production area in Anji County, Zhejiang Province, the agricultural technology extension department estimates that tea aphids cause a 5% to 10% decline in tea output every year. Since the young shoots of tea trees are the raw materials for making famous and high-quality tea, tea aphids are harmful to tea buds and young leaves. The use of chemical pesticides to control aphids wi...

Claims

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Application Information

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IPC IPC(8): A01N35/04A01P19/00A01N27/00
Inventor 韩善捷崔林韩宝瑜
Owner CHINA JILIANG UNIV
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