Walnut leaf plant miticide and preparation method thereof

A technology of walnut leaves and acaricide, applied in the field of acaricide and its preparation, can solve the problems of killing mite natural enemies, producing drug resistance, polluting the environment, etc., achieves high efficiency of chemical pesticides, is conducive to industrial production, and is simple and easy to extract line effect

Inactive Publication Date: 2007-12-12
BEIJING UNIV OF AGRI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Herbivorous mites are global plant pests and are also recognized as the most difficult pest group to control. Extensive use of broad-

Method used

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  • Walnut leaf plant miticide and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0061] Wash the walnut leaves, dry in the shade in a ventilated place, or dry at 20-30°C, grind them and pass through a 40-mesh sieve. Put the pulverized plant powder into a multifunctional extraction tank, extract with petroleum ether (30-90° C.) or chloroform 5 times the volume of the plant powder, collect the petroleum ether extract phase, and concentrate under reduced pressure to obtain the extract. Take 10kg of the extract, add 50kg of toluene or xylene into a mixing kettle with a stirrer and a thermometer, mix for 1.5 hours at 40°C, add 1.5kg of sodium stearate, 3kg of Tween 80, and dodecylbenzenesulfonate Sodium nitrate 1.5kg, ketone 1.5kg, mix homogeneously, obtain walnut leaf extract 14.8% acaricide emulsifiable concentrate.

Embodiment 2

[0063] Wash the walnut leaves, dry in the shade in a ventilated place, or dry at 20-30°C, grind them and pass through a 40-mesh sieve. Put the pulverized plant powder into a multifunctional extraction tank, extract with 7 times the volume of chloroform, and concentrate under reduced pressure to obtain the extract. Take 8kg of the extract, add 50kg of toluene or xylene into a mixing kettle with a stirrer and a thermometer, mix for 3 hours at 40°C, add 4kg of sodium stearate, 3kg of Tween 80, dodecylbenzene Sodium sulfonate 1.5kg, ketone 1.5kg, mix uniformly, obtain walnut leaf extract 11.8% acaricide emulsifiable concentrate.

Embodiment 3

[0065] Wash the walnut leaves, dry in the shade in a ventilated place, or dry at 20-30°C, grind them and pass through a 40-mesh sieve. Put the pulverized plant powder into a multifunctional extraction tank, extract with 7 times the volume of methanol, and concentrate under reduced pressure to obtain the extract. Take 6kg of the extract and add 40kg of methanol, pour it into a mixing kettle with a stirrer and a thermometer, mix for 3 hours at 40°C, add 3kg of Tween 80 and 1kg of ketone and mix evenly to make a walnut leaf extract 12% Acaricide EC.

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Abstract

The invention relates to a plant acaricide for preventing and treating acarid on cash crops such as fruit tree and vegetable, and its preparation method and application. The acaricide is prepared from active components of Juglans regia leaf, surfactant, emulsifying agent, penetrant, and synergist; and has high efficiency, low toxicity, low residual, and no enviromental pollution.

Description

technical field [0001] The invention relates to a pesticide and a preparation method thereof, in particular to an acaricide and a preparation method thereof. Background technique [0002] Herbivorous mites are global plant pests and are also recognized as the most difficult pest group to control. Extensive use of broad-spectrum acaricides not only pollutes the environment, but also kills natural enemies of harmful mites and produces drug resistance. rampant. It can be seen that it is imperative to invent a novel biopesticide with high efficiency, low toxicity, low residue, and harmony with the environment and other organisms. Contents of the invention [0003] The invention adopts a chemical extraction method to extract the effective part of the walnut leaf which has a lethal effect on mites from the leaves of the walnut Juglans regia L. and prepares the botanical acaricide. [0004] The effective part of the walnut leaf of the present invention can be walnut leaf extrac...

Claims

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Application Information

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IPC IPC(8): A01N65/00A01P7/02A01N65/08
Inventor 师光禄王有年曹挥
Owner BEIJING UNIV OF AGRI
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