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Method and device for spraying thermal fog carried biological pesticide

A biopesticide and thermal smoke technology, applied in botany equipment and methods, plant protection, horticulture, etc., can solve the problems of pesticide decomposition, denaturation, and loss of activity

Inactive Publication Date: 2012-07-18
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since water and pesticides are sprayed into the nozzle separately, pesticides and water are separated, which leads to the fact that although water is sprayed into the nozzle to reduce the temperature in the nozzle, the pesticide is still exposed in the high-temperature, high-speed hot air flow in the nozzle, which is inevitable. Pesticides will decompose and denature and lose their activity

Method used

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  • Method and device for spraying thermal fog carried biological pesticide
  • Method and device for spraying thermal fog carried biological pesticide
  • Method and device for spraying thermal fog carried biological pesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Bacillus thuringiensis (Bt) thermal atomization activity test

[0024] 1. Thermal mist preparation

[0025] Glycerin (glycerin) and water were selected as the solvents for Bacillus thuringiensis hot spray, and were prepared according to three volume ratios of 55:45, 65:35, and 75:25. bacteria in a 500mL Erlenmeyer flask. Add 10% by volume (referring to adding 50mL Bacillus thuringiensis fermentation broth) to each 500mL preparation respectively to prepare the Bacillus thuringiensis hot spray. Then add anti-oxidant sodium benzoate with a volume ratio of 3‰, Tween-20 with 3‰, and inhibitor sodium dodecylbenzoate with 3‰ respectively, shake well, and prepare three kinds of hot fog agents A1, A2 and A3 Preparations are stored at room temperature for later use.

[0026] 2. Smoke temperature at nozzle outlet

[0027] Using diesel oil as a control, put the prepared A1, A2, A3 Bacillus thuringiensis thermal sprays into the medicine box of the 6HY-25 fog machin...

Embodiment 2

[0040] Embodiment 2: Beauveria bassiana thermal atomization activity test

[0041] 1. Beauveria bassiana thermal spray preparation

[0042] Choose glycerol and water as the solvent of Beauveria bassiana thermal mist, according to three volume ratios of glycerin and water 55: 45, 65: 35, 75: 25, Beauveria bassiana high spore powder: solvent (1: 50 ) is prepared into 2% Beauveria bassiana thermal mist by volume, each with 250mL preparations, which are respectively denoted as A1, A2, and A3, and are respectively packed in sterilized 500mL triangular flasks, and 3‰ of antioxidant benzene is added respectively. Sodium formate, 3‰ Tween-80, 3‰ inhibitor sodium dodecyl benzoate, shake well, store in 4℃ environment for later use.

[0043] 2. Measurement of the temperature of the smoke and droplets at the outlet of the nozzle

[0044] Using No. 0 diesel oil as a comparative test, put the prepared A1, A2, and A3 Beauveria bassiana hot fog agents into the medicine box of the 6HY-25 fog...

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Abstract

The invention provides a method and device for spraying thermal fog carried biological pesticide, so that biological pesticide liquor is thermally fogged to rise up, spread and suspend over the prevention space while not losing the activity of the biological pesticide. The method for spraying biological pesticide is as follows: adding the oil-based suspension of the biological pesticide into the following solvent to prepare hot fogging concentrate, and then spraying the hot fogging concentrate into the spraying tube of a fog machine to be fogged and sprayed out. The temperature of the fogged hot fogging concentrate at the nozzle is 300 DEG C + / - 500 DEG C; and, in the solvent, the ratio of glycerol to water by volume is 55-75:25-45. The device for spraying biological pesticide includes a fog machine, the fog machine has a spraying tube, a nozzle is arranged on the spraying tube, the nozzle is communicated with a pesticide tank, and the pesticide tank is communicated with a gas pressure tube; and the pesticide tank is filled with thermal fogging concentrate mixed from oil-base suspension of the biological pesticide, glycerol and water.

Description

technical field [0001] The invention relates to a method and a device for releasing biological pesticides. Background technique [0002] Biological pesticides refer to preparations that use living organisms or their metabolites to kill or inhibit harmful organisms in agriculture and forestry. [0003] At present, the dosage forms of biopesticide preparations are: wettable powder, powder, oil suspension, granule, and emulsion. According to the different dosage forms and control objects, there are correspondingly different application methods: for granules and powder dosage forms, the methods of hand spreading, bag shaking, powder cannon and mechanical dusting are generally used; wettable powders and emulsions are generally diluted with water Spray with a sprayer. These usage methods are not only labor-intensive and time-consuming, but also have a very low effective utilization rate of biopesticides, and cannot adapt to large-scale applications. [0004] Oil suspension (oil...

Claims

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Application Information

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IPC IPC(8): A01G13/06
Inventor 许林云唐进根周宏平许路
Owner NANJING FORESTRY UNIV
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