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Pesticide compounded by azadirachtin and cnidium lactone and preparation method thereof

A technology of osthole and azadirachtin, applied in the directions of pesticides, botanical equipment and methods, biocides, etc., to achieve the effects of good environmental compatibility, promotion of sustainable development, and high safety

Active Publication Date: 2013-06-12
ZHEJIANG FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The use of azadirachtin and osthole in the control of pear gall midges has not been reported

Method used

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  • Pesticide compounded by azadirachtin and cnidium lactone and preparation method thereof
  • Pesticide compounded by azadirachtin and cnidium lactone and preparation method thereof
  • Pesticide compounded by azadirachtin and cnidium lactone and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: According to the raw materials corresponding to Embodiment 1 in Table 1 and the ratio by weight thereof, a sufficient amount of bamboo vinegar or wood vinegar was left to stand for 5 to 8 months and then filtered to make mother liquor, and then 0.1 part of neem Add 0.1 part of osthole and 0.5 part of antioxidant into 5 parts of organic solvents for dissolving, make the oil phase after colloidal grinding and mixing, then add a small amount of bamboo (wood) vinegar to 5 parts of emulsifier, stir well and make Water phase, mix the water phase and oil phase through a colloid mill, then add a small amount of bamboo vinegar or wood vinegar to the remaining other additives in their respective parts by weight, and mix this mixture with the water phase and oil phase mixture in Together, grind and mix evenly in a colloid mill, and finally add the remaining bamboo (wood) vinegar completely, so that the total amount of bamboo (wood) vinegar added reaches 85.3 parts, an...

Embodiment 2～9

[0032] The rest of Examples 2 to 9 are prepared in the same way as Example 1 according to the raw materials and their weight ratios in Table 1, and Example 4 is preferred. Table 1 Nine Examples of Raw Material Types and Their Weight Ratio Values

[0033]

[0034] The indoor virulence determination experiment relevant to the application and the situation of the field control effect test comprising five experimental examples are made an introduction below:

[0035] 1. Indoor toxicity test

[0036] 1.1 Materials and methods

[0037] 1.1.1 Test insects

[0038] Pear gall midges were collected from the field, and healthy 2nd instar larvae of the same size were selected in the laboratory as test insects.

[0039] 1.1.2 Drugs to be tested

[0040] 25% azadirachtin, Yunnan Nanbao Phytochemical Co., Ltd.; 20% osthole, Xi'an Tianben Bioengineering Co., Ltd. The test agents azadirachtin (A) and osthole (B) were dissolved with acetone and diluted to 1000 mg / L mother solution. Aza...

example 1

[0049] The preparation method of example one compound insecticide is:

[0050] (1) Let the bamboo (wood) vinegar solution stand for 5 to 8 months, filter it, and collect it as mother liquor.

[0051] (2) Add azadirachtin, osthole and tocopherol in proportion to ethanol and acetone as a solvent to dissolve, and mix evenly through a colloid mill to obtain an oil phase; the colloid mill does not make special requirements, and can achieve uniform mixing effect.

[0052] (3) Add an appropriate amount of bamboo (wood) vinegar obtained in step (1) into the polyoxyethylene sorbitan fatty acid ester and castor oil polyoxyethylene ether as emulsifiers, stir and dissolve, and obtain an aqueous phase.

[0053] (4) Add the water phase to the oil phase, and mix evenly through a colloid mill.

[0054] (5) Add an appropriate amount of bamboo (wood) vinegar obtained in step (1) to the other additives, stir and dissolve, then add the mixture obtained in step (4), grind and mix;

[0055] (6) ...

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Abstract

A pesticide compounded by azadirachtin and cnidium lactone comprises the raw material medicines in parts by weight as follows: 0.1-5 parts of azadirachtin, 0.1-5 parts of cnidium lactone, 5-15 parts of an emulsifying agent; 1-6 parts of a dispersing agent, 0.5-2 parts of an antioxidant agent, 0.5-1 part of a stabilizing agent, 0.5-10 parts of a penetrating agent, 1-10 parts of an antifreeze agent, 1-3 parts of a defoaming agent, and a bamboo vinegar or a wood vinegar is added to obtain 100 parts. The pesticide is prepared by six steps including the filtration of bamboo (wood) vinegar, the preparation of an oil phase, an aqueous phase and a mixed solution, and the preparation of an insecticide suspension emulsion; the pesticide is mainly applied to the prevention of contarinia pyrivora, the synergism effect is remarkable, and the prevention and treatment efficiency in the fields is excellent; and the pesticide does not enable insects to generate resistance to drugs for long-term use, can be decomposed automatically, and is safe, efficient, free from pollution, low in cost and good in persistence.

Description

technical field [0001] The invention relates to an insecticide compounded with plant source azadirachtin and osthole mainly used for preventing and controlling agricultural pests such as pear gall midge and a preparation method thereof. Background technique [0002] my country's pear tree cultivation area and output both rank first in the world. According to the statistics of the United Nations Food and Agriculture Organization (FAO), in 2009 China's pear tree harvest area was 1.258 million ha 2 , accounting for 72.3% of the world's total pear area; the total annual output is 14.388 million tons, accounting for 65.7% of the world's total output. Pear gall midge was a minor pest of pear trees in the past, and its damage was relatively light. However, in recent years, it has become a major pest of pears in major pear producing areas in my country. It can easily cause early leaf defoliation of pear trees and significantly affect yield and quality. At present, the control of pe...

Claims

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Application Information

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IPC IPC(8): A01N43/90A01N43/16A01P7/04A01N25/04
Inventor 徐凯郑伟尉陈梅生张岚岚阚志强
Owner ZHEJIANG FORESTRY UNIVERSITY
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