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Application of pyrethrin in preventing and controlling Aleurodicus disperses Russell and pyrethrin synergistic composition

A technology of pyrethrin and screw whitefly, applied in the field of botanical insecticides, pyrethrins in the control of screw whitefly, pyrethrin synergistic compound

Active Publication Date: 2011-05-18
广州瑞丰生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, pyrethrins are used to control pests such as Spodoptera litura, Pieris rapae, Liriomyza sativae and vegetable aphids (Chen Fenglian et al., 2005; Xiong Guilian et al., 2007; Lu Jijun et al., 2009; Wang Zhongwei et al., 2010); Technical report on the control of screw whitefly and the synergistic effect of pyrethrins mixed with kerosene and soap solution in the control of screw whitefly

Method used

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  • Application of pyrethrin in preventing and controlling Aleurodicus disperses Russell and pyrethrin synergistic composition
  • Application of pyrethrin in preventing and controlling Aleurodicus disperses Russell and pyrethrin synergistic composition
  • Application of pyrethrin in preventing and controlling Aleurodicus disperses Russell and pyrethrin synergistic composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The preparation method of embodiment 1 5% pyrethrin emulsifiable concentrate preparation:

[0029] Measure 1.0 ml of 50% pyrethrin crude oil (the pyrethrin crude oil in this example was purchased from Yunnan Nanbao Phytochemical Co., Ltd., mainly containing pyrethrins I (pyrethrin I) and pyrethrins II (pyrethrin II), and their contents are respectively 26.50% and 23.04%) in a 15ml stoppered test tube, add 8ml cyclohexanone and stir until dissolved, then add 1ml Nongru 0206, shake well to get 5% pyrethrin EC preparation.

[0030] Determination of the poisonous effect of 5% pyrethrin emulsifiable oil on screw whitefly adults:

[0031] Dilute 5% pyrethrin EC with water to 5 concentrations of 0.25, 0.5, 1.0, 2.0 and 4.0ppm. Take terminalia leaves and cut them into leaf discs with a diameter of d=7cm, put them into a petri dish (diameter d=7cm) lined with moist filter paper, insert 30 to 35 adults of the spiral whitefly, and put the inoculated petri dish into In the spray ...

Embodiment 2

[0033] Example 2 Preparation method of pyrethrin synergistic compound

[0034] Weigh 6g of soap (commercially available) in a 100ml beaker, add 34g of water, heat on an electric stove, stir while heating to completely dissolve the soap, then add 14g of kerosene, stir well to obtain a kerosene-soap mixture;

[0035]Take 1 part of the kerosene soap mixture (volume ratio), mix it with 20 parts of water, and stir it thoroughly, and use it as solution A; take 1 part (volume ratio) of the 5% pyrethrin EC preparation, mix it with 1000-2000 parts of water, and stir it fully , as solution B; mix equal volumes of the two solutions A and B to obtain the pyrethrin synergistic complex.

Embodiment 3

[0036] Example 3 Determination of the poisonous effect of 5% pyrethrin emulsifiable concentrate preparation mixed with different concentrations of kerosene and soap mixture on the screw whitefly adults

[0037] The ratio of pyrethrins mixed with different concentrations of kerosene and soap is shown in Table 1. The spray method of Example 1 is used to measure the synergistic effect of pyrethrins on the mixing of different concentrations of kerosene and soap to adults of screw whitefly. Test see attached results figure 2 .

[0038] Table 1 The proportion of pyrethrin mixed with different concentrations of kerosene and soap

[0039] deal with

[0040] From attached figure 2 It can be understood that after pyrethrins at a concentration of 0.5ppm are used alone, or mixed with kerosene, or mixed with soap, the average mortality rate of adults of the spiral whitefly is lower, while pyrethrins at a concentration of 0.5ppm are combined with 0.6-1.0% kerosene and 0.25 Th...

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Abstract

The invention discloses application of pyrethrin in preventing and controlling Aleurodicus disperses Russell and a pyrethrin synergistic composition. When the pyrethrin is applied in preventing and controlling the Aleurodicus disperses Russell, the effect is best, the dosage is a little and the killing effect is quick; and when the pyrethrin is further mixed with kerosene-soap mixed solution, thepoisoning and killing effect of the natural pyrethrin on the Aleurodicus disperses Russell can be obviously improved, and the natural pyrethrin has high efficiency, low toxicity and low residue and has good application prospect in the pest control aspect.

Description

technical field [0001] The invention belongs to the technical field of pesticide production, processing and use, and relates to a botanical insecticide, in particular to the application of pyrethrins in preventing and controlling whitefly and a pyrethrin synergistic compound. Background technique [0002] Spiral whitefly ( Aleurodicus dispersus Russell) belongs to Homoptera (Homoptera), whitefly family (Aleyrodidae), small whitefly genus, is a kind of worldwide polyphagous pest. The host range of screw whitefly is very wide, and it seriously harms agricultural and forestry crops such as vegetables, fruit trees, ornamental plants, street trees and forests. The worm originated in Central America and the Caribbean, and has been distributed in more than 50 countries and regions in Europe, Asia, Africa, America and Oceania (Xu Yan, 1999). In 1988, it was first reported that the spiral whitefly invaded Taiwan (Wen Hongzhi, 1994). In 2006, it was found that the insect had invad...

Claims

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Application Information

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IPC IPC(8): A01N65/12A01P7/04A01N25/04
CPCY02A50/30
Inventor 张茂新凌冰王健明
Owner 广州瑞丰生物科技有限公司
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