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Wettable powder of bacillus thuringiensis and beauveria bassiana

A technology of wettable powder and Bacillus thuringiensis, applied in the direction of insecticide, biocide, animal repellent, etc., can solve the problems of unsatisfactory control effect, short field delayed effect, easy to produce resistance, etc., and achieve product performance Excellent indicators, extended storage time and duration, and the effect of expanding the control spectrum

Active Publication Date: 2012-09-26
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control effect of Beauveria bassiana is greatly affected by the environmental humidity. When the relative humidity is low, the control effect is not ideal, and the insecticidal speed is relatively slow, which affects its enthusiasm for agricultural and forestry pest control.
[0003]Bacillus thuringiensis (Bacillus thuringiensis, referred to as Bt) is the most widely used and produced biopesticide in the world, but commercial Bt preparations In terms of production control, there are also disadvantages such as poor quick-acting performance, insensitivity to older larvae, short field-delayed performance, and easy resistance, which have become restrictive factors affecting the further successful promotion of Bt.

Method used

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  • Wettable powder of bacillus thuringiensis and beauveria bassiana
  • Wettable powder of bacillus thuringiensis and beauveria bassiana
  • Wettable powder of bacillus thuringiensis and beauveria bassiana

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specific Embodiment approach 1

[0019] Specific embodiment 1: The Bacillus thuringiensis Beauveria bassiana wettable powder of this embodiment is made of the following ingredients: 10-14wt.% Bacillus thuringiensis, 4-14wt.% Beauveria bassiana, 3-5wt.% wetting agent, 10 ~20wt.% dispersant, 0.1~0.5wt.% UV protection agent, 50~60wt.% carrier.

[0020] In this embodiment, the Bacillus thuringiensis is Kustac subspecies ( Bacillus thuringiensis subsp. kurstaki ), the mass is 50000IU / mg.

[0021] In the present embodiment, described Beauveria bassiana is Beauveria bassiana ( Beauveria bassiana ), with a mass of 100 billion / g.

[0022] In this embodiment, the wetting agent is one or a mixture of Morwet EFW, sodium lauryl sulfate, MF-5, TERWET1010, and WLNO.

[0023] In this embodiment, the dispersant is one or a mixture of sodium lignosulfonate, calcium lignosulfonate, TERSPERSE 2020, Morwet D425, and sodium methylene bis-naphthalenesulfonate.

[0024] In this embodiment, the carrier is one or a mixture of w...

specific Embodiment approach 2

[0026] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the wettable powder is made of the following ingredients: 10-14wt.% Bacillus thuringiensis, 4-14wt.% Beauveria bassiana, 0.5-2wt.% Morwet EFW, 2-4wt.% sodium lauryl sulfate, 8-10wt.% Morwet D425, 8-10wt.% TERSPERSE 2020, 0.1-0.5wt.% xanthan gum, 50-60wt.% attapulgite, The preparation method is as follows:

[0027] (1) Mix Bacillus thuringiensis, Beauveria bassiana, Morwet EFW, sodium lauryl sulfate, Morwet D425, TERSPERSE2020, xanthan gum and attapulgite according to the above ratio;

[0028] (2) Raw materials are pre-crushed and passed through a 400-mesh standard sieve;

[0029] (3) Quality inspection, the spore germination rate of Beauveria bassiana ≥ 75.26%; the spore germination rate of Bacillus thuringiensis 85.14%, wettability < 1 min; mass suspension rate 72.73%, spore suspension rate 75.13%, moisture The content is 2.56%; the fineness (through a 400-mesh standard si...

specific Embodiment approach 3

[0030] Specific embodiment three: The raw material composition of Bacillus thuringiensis · Beauveria bassiana wettable powder in this embodiment is shown in Table 1.

[0031] Table 1 Raw material ratio unit: mass percentage %

[0032] Component Recipe I Recipe II Formula III Formula IV Bacillus thuringiensis original drug 13.7 11 10.3 12.5 Beauveria bassiana spore powder 6 13.3 11.5 8.2 Morwet EFW 1 1 1.2 0.8 Sodium Lauryl Sulfate (K12) 3 3 3.5 2.5 Morwet D425 9 9 8.5 9.5 TERSPERSE2020 9 9 9.5 8.5 xanthan gum 0.3 0.3 0.2 0.4 Attapulgite 58 53.4 55.3 57.6

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Abstract

A wettable powder of bacillus thuringiensis and beauveria bassiana relates to a mixed biopesticide, aiming to the shortcomings of prevention and treatment limitations of beauveria bassiana and bacillus thuringiensis (Bt), particularly poor quick-acting property of microbial pesticides. The wettable powder provided in the invention is prepared from the following components: 10-14wt.% of bacillus thuringiensis, 4-14wt.% of beauveria bassiana, 3-5wt..% of wetting agent, 10-20wt.% of dispersant, 0.1-0.5wt.% of ultraviolet protectant and 50-60 wt.% of carrier. The wettable powder of bacillus thuringiensis and beauveria bassiana provided in the invention is high in activity, stable in effect, long in persistence and convenient for use.

Description

technical field [0001] The invention relates to a mixed biological pesticide, in particular to a wettable powder containing bacteria Bacillus thuringiensis and fungus Beauveria bassiana. Background technique [0002] Beauveria bassiana is a fungus of the genus Cordyceps (Cordycipitaceae) of the order Hypocreales, which can parasitize more than 700 species of insects of 15 orders, 149 families and 521 genera, and 6 families and 17 species of mites and ticks of the order Acarina. order hosts, causing insect poisoning and death. Beauveria bassiana high sporopollen is one of the high-efficiency biopesticides. It has been widely used in the control of agricultural and forestry pests because of its non-toxic, tasteless and pollution-free. The domestic application of Beauveria bassiana has been successful in the control of nearly 40 kinds of agricultural and forestry pests. However, the control effect of Beauveria bassiana is greatly affected by the environmental humidity. When t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N63/04A01N63/00A01N25/14A01P7/04
Inventor 曹传旺王志英孙丽丽景天忠张健
Owner NORTHEAST FORESTRY UNIVERSITY
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