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A halogenated pheromone antagonist for controlling cabbage armyworm

A technology of cabbage armyworm and pheromone, which is applied in the fields of chemicals for biological control, pest control, application, etc., can solve the problems that no sex pheromone and pheromone antagonists of cabbage armyworm have been found, and reduce the reproduction rate , Environmentally friendly, the effect of less dosage

Active Publication Date: 2019-09-13
中捷四方(北京)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

However, no pheromone antagonist with a super strong interference effect on the sex pheromone of cabbage armyworm has yet to be found

Method used

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  • A halogenated pheromone antagonist for controlling cabbage armyworm
  • A halogenated pheromone antagonist for controlling cabbage armyworm
  • A halogenated pheromone antagonist for controlling cabbage armyworm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation of embodiment 1 trans-11-hexadecenyl trifluoroacetate

[0025] Compounds in the present invention can be synthesized by the same route, Figure 6 Shown is the synthesis of trans-11-hexadecenyl trifluoroacetate as an example.

[0026] Dissolve 2.00g (8.31mmol) trans-11-hexadecenol in 15mL of anhydrous dichloromethane, add a catalytic amount of 4-dimethylaminopyridine, and keep the temperature at about 0°C in an ice bath, gradually Add the dichloromethane solution of difluoroacetic anhydride dropwise. After the dropwise addition, put it in an ice bath for 30 minutes, react overnight at room temperature, remove the solvent by rotary evaporation under reduced pressure, and separate by column chromatography to obtain 1.70 g (4.99 mmol) of a yellow oil, with a yield of 85%. . 1 HNMR (300MHz, internal standard TMS, solvent CDCl 3 )δ0.93(t, 1H), 1.26-1.43(m, 9H), 1.60(m, 1H), 2.16(m, 2H), 4.13(t, 1H), 5.43(m, 2H).

Embodiment 2

[0027] Embodiment 2 field biological activity determination test

[0028] Lure preparation:

[0029] (1) The lure carrier adopts a cylindrical green concave rubber plug with a height of 1 cm and a bottom diameter of 1 cm.

[0030] (2) Mix cis-11-hexadecenyl acetate, tetradecyl acetate, and hexadecyl acetate with the mass ratio of 90:2:7 , diluted with n-hexane to a solution with a concentration of 1 μg / μL.

[0031] (3) Pipette 99 μL (99 μg) of the above-mentioned cabbage budworm pheromone solution and add it to the bottom of the rubber head, and the cabbage budworm pheromone solution will penetrate into the inside of the rubber along with the solvent (n-hexane). After the solvent (n-hexane) evaporated, 99 μg of Brassica cabbage pheromone was obtained.

[0032] (4) Trans-11-hexadecenyl trifluoroacetate, trans-11-hexadecenyl-3,3,3-trifluoro-2-methylpropionate, trans-11- Hexadecenyl-2,2-difluoroacetate, trans-11-hexadecenyl-2,2,3,3,3-pentafluoropropionate and trans-11-hexadec...

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Abstract

The invention discloses a halogenated pheromone antagonist for preventing and treating mamestra brassicae and belongs to the technical field of biological prevention and treatment. A general formula of the halogenated pheromone antagonist is ROCOCnHaXb (R is trans-11-hexadecenyl, X is a halogen atom, n, a and b belong to N*, wherein n is greater than or equal to 1 and less than or equal to 5, a+b is equal to 2n+1, a is greater than or equal to 0 and less than 2n+1 and b is greater than 0 and less than or equal to 2n+1). The halogenated pheromone antagonist disclosed by the invention can be used for interfering the orientation of mamestra brassicae male worms to female worms and the female worms are disorientated, so that the meeting probability of the female worms and the male worms is reduced; the mating is interfered, the reproduction rate is reduced and the extinction of pest population is gradually controlled, so that the aim of preventing and controlling pests is realized. The halogenated pheromone antagonist has less dosage and can be used for remarkably alleviating damages, caused by the mamestra brassicae, to cruciferous vegetables; meanwhile, the halogenated pheromone antagonist is environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of biological control, and in particular relates to a halogenated pheromone antagonist for controlling cabbage armyworm. Background technique [0002] Cabbage moth (Mamestra brassicae Linnaeus) belongs to Lepidoptera Noctuidae and is a major vegetable pest with a wide distribution range. It mainly harms the leaves of crops with larvae, eats the leaves, pollutes the leaf balls, and brings huge economic losses to agricultural production in severe cases. Spodoptera cabbage has strong fecundity, and the chemical agents known to have good control effects on it are mostly organochlorine pesticides that are banned from production, and Spodoptera cabbage has developed resistance to many chemical agents to varying degrees. Long-term use of chemical agents to control cabbage armyworm may pollute the environment, destroy natural enemies and ecosystems, and the control effect is unstable. [0003] During the courtship...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N37/06A01P15/00A01P19/00A01M1/02A01M1/10C07C67/08C07C69/63
Inventor 梅向东王安佳宁君折东梅张开心
Owner 中捷四方(北京)生物科技有限公司
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