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Bacillus thuringiesis particle agent and its preparing method and use

A Bacillus thuringiensis and granule technology, applied in the directions of botanical equipment and methods, applications, biocides, etc., can solve the problems of high toxicity and high residues of carbofuran, labor and time-consuming, difficult to mix, etc., and achieve long insecticidal residual effect period. , easy to use effect

Inactive Publication Date: 2005-10-19
牛俊杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. It is difficult for users to mix evenly when mixing, which is labor-intensive and time-consuming; 2. The effective insecticidal ingredients are easy to drift with the wind when mixing, causing artificial waste; 3. The effective insecticidal ingredients are adsorbed on fine sand Or the surface of fine soil, easy to passivate by light
Bt mixed granule, CN 1043603A Chinese patent discloses that this mixed agent is to be that the Bt bacterial agent of carrier and 3% carbofuran granule are mixed with 20-40 mesh river sand, and its shortcoming is that carbofuran is high Chemical pesticides with high toxic residues have been included in the list of banned pesticides in pollution-free or green food production by "PIC" signatory countries (including China), so the Bt mixed granules cannot be used in pollution-free food production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] After mixing and disinfecting 400 grams of wheat bran, 1-10 grams of lime, and 430 grams of water, inoculate 830 grams of Wannong Dayu No. 1 Bt solid fermentation material with a concentration of 1:50 at a temperature of 20°C and a relative humidity of 98%. Under the conditions of Bt solid open fermentation for 28 hours, when the spore and crystal removal rate reaches 30%, stop the fermentation and discharge the material in time, and dry it in a kang drying room at about 55°C to obtain a moisture content of ≤10%. , Bt granules with a viable spore count of 5-40 billion / g.

Embodiment 2

[0032] After mixing and disinfecting 500 grams of rice bran and bran mixture, 1-10 grams of lime, and 500 grams of water, inoculate 1,000 grams of Wannong Dayu No. 1 Bt raw powder at a concentration of 1:45 at a temperature of 38°C. , under the condition that the relative humidity is 50%, after Bt solid open fermentation for 24 hours, when the spore and crystal detachment rate reaches 30%, stop the fermentation and discharge the material in time, and dry it in a kang drying room at about 40°C to obtain Bt granules with a moisture content of 10% and a live spore count of 5-40 billion / g.

Embodiment 3

[0034] After mixing and disinfecting 400 g of corn flour, 1-10 g of lime, and 500 g of water, inoculate 1,000 g of Wannong Dayu No. 1 Bt wettable powder with a concentration of 1:50 at a temperature of 26°C and a relative humidity of 70 % under the condition of Bt solid open fermentation for 48 hours, when the spore and crystal detachment rate reaches 30%, stop the fermentation and discharge the material in time, and dry it in a kang drying room at about 70°C to obtain a moisture content of 5%. , Bt granules with a viable spore count of 5-40 billion / g.

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PUM

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Abstract

The granular Bacillus thuringiesis preparation has toxicity valence of 200-16000 IU / mg and live spore number of 0.5-40 billion / g. It is prepared with Bacillus thuringiesis spawn in 1-10 wt% and supplementary material in 10-99 wt% by mixing, sterilizing, fermentation, and drying. It is used in preventing and killing lepidopterous pests and ground pests, and the applied quality is 0.375-75 Kg with live spore number of 0.5-40 billion / g or toxicity valence of 200-16000 IU / mg each ha. The present invention has the features of low cost, no toxicity, no residue, long pesticidal effect, etc.

Description

【Technical field】 [0001] The invention relates to a bacillus thuringiensis (hereinafter referred to as Bt) preparation and a preparation method thereof, specifically, the invention relates to a Bt granule and a preparation method thereof. 【Background technique】 [0002] In the prior art, there is no pure Bt granule product. When Bt prevents corn borer or underground pests in the bell-mouth stage of corn, the Bt suspension concentrate, Bt suspoemulsion or Bt wettable powder obtained by concentrating the liquid fermentation is mixed with a certain proportion of fine sand or fine soil, etc. Medicinal sand or medicinal soil is applied to the horn mouth of the corn or sprinkled on the soil. Its disadvantages are: 1. It is difficult for users to mix evenly when mixing, which is labor-intensive and time-consuming; 2. The effective insecticidal ingredients are easy to drift with the wind when mixing, resulting in artificial waste; 3. The effective insecticidal ingredients are adsor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/12A01N63/04
Inventor 牛俊杰
Owner 牛俊杰