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Bacillus thuringiensis floating sustained-release tablet and preparation method thereof

A technology of Bacillus thuringiensis and Bacillus thuringiensis, which is applied in the field of Bacillus thuringiensis sustained-release floating tablet and its preparation, can solve the problems of inconvenient use of wettable powder, instability of liquid preparation, and difficulty in forming a scale, so as to reduce dosage The number of times, good stability, and the effect of reducing the release speed

Inactive Publication Date: 2016-06-08
WUHAN KERNEL BIO-TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, Bti wettable powder or liquid is generally applied on the water surface or water accumulation area to kill mosquito larvae to achieve the purpose of mosquito control. Because liquid is not stable, it is difficult to form a large scale. Wettable powder Inconvenient to use, easy to settle, and short-lasting, resulting in poor mosquito control effect

Method used

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  • Bacillus thuringiensis floating sustained-release tablet and preparation method thereof
  • Bacillus thuringiensis floating sustained-release tablet and preparation method thereof
  • Bacillus thuringiensis floating sustained-release tablet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A Bacillus thuringiensis slow-release floating tablet, which is made of the following ingredients in proportion by weight:

[0020]

[0021] Raw material description:

[0022] (1) Cork granules: peel off the outer brown layer of the thick bark, and pulverize the inner light yellow or off-white soft bark layer through a blade grinder, and sieve the granules with a diameter of 0.1 to 1 mm for later use;

[0023] (2) Kaolinite granules: kaolinite is prepared into light porous materials by high-temperature calcination process, and after crushing and screening, take 0.1-1mm diameter particles for later use;

[0024] (3) Bacillus thuringiensis subspecies Israel technical powder: purchased through commercial channels, the biological potency is greater than 6500ITU / mg.

[0025] The preparation process is as follows:

[0026] 1) Grinding 10Kg of Bacillus thuringiensis subsp. Israelite technical powder to 200-700 mesh by airflow, and then mixing with 39Kg of cork particles a...

Embodiment 2

[0030] A bacillus thuringiensis slow-release floating tablet, which consists of the following ingredients in proportion by weight:

[0031]

[0032]

[0033] The preparation process is as follows:

[0034] 1) 5Kg of the original drug powder of Bacillus thuringiensis subsp. Israel was crushed to 200-700 mesh by airflow, and then mixed with 45Kg of cork particles and 18Kg of montmorillonite particles to obtain 68Kg of dry material;

[0035] 2) Swell CMC-Na1Kg with water into a sol with a weight content of 2%, then stir and mix with latex 30Kg to obtain 80Kg of mixed glue;

[0036] 3) Mix the dry material with the mixed glue, stir to make a soft material, and then use 0.5Kg / cm in the mold 2 The pressure is pressed into tablets, and after demoulding, it is dried until the moisture content is lower than 10%.

Embodiment 3

[0038] A bacillus thuringiensis slow-release floating tablet, which consists of the following ingredients in proportion by weight:

[0039]

[0040] The preparation process is as follows:

[0041] 1) 15Kg of the technical powder of Bacillus thuringiensis subsp. Israel is crushed by airflow to 200-700 mesh, and then mixed with 25Kg of cork particles and 40Kg of asbestos particles to obtain 80Kg of dry material;

[0042] 2) Swell CMC-Na0.1Kg with water into a sol with a weight content of 0.5%, then stir and mix with latex 19.8Kg to obtain 40Kg of mixed glue;

[0043] 3) Mix the dry material with the mixed glue, stir to make a soft material, and then use 2Kg / cm in the mold 2 The pressure is pressed into tablets, and after demoulding, it is dried until the moisture content is lower than 10%.

[0044] For detecting the mosquito-killing effect of the present invention, we drop into 100 2-year-old larvae of artificial rearing respectively in 4 1 ton airtight water-adding contain...

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Abstract

The invention discloses a bacillus thuringiensis floating sustained-release tablet. The bacillus thuringiensis floating sustained-release tablet comprises 25-45% of granulated cork 0.1-1mm in grain size, 15-40% of silicate mineral granules 0.1-1mm in grain size, 5-15% of bacillus thuringiensis israelensis active ingredient powder, 10-30% of latex, 0.1-1% of CMC-Na and 0.1-1% of antiseptic. The bacillus thuringiensis floating sustained-release tablet is capable of floating on the water stably and releasing chemicals in a sustained manner, so that lasting effect time is prolonged remarkably and the number of times of bacillus thuringiensis floating sustained-release tablet throwing is decreased.

Description

technical field [0001] The invention belongs to the field of biological pesticides, and relates to a bacillus thuringiensis slow-release floating tablet for preventing and controlling mosquitoes in water bodies and a preparation method thereof. Background technique [0002] Mosquitoes are a kind of pests that widely exist in nature. It not only seriously affects our life, but also is the medium of spreading various diseases. At present in our country, there are more than 10 species of mosquitoes that suck blood and can transmit diseases. The diseases transmitted mainly include malaria, filariasis, Japanese encephalitis and dengue fever, etc., which seriously endanger the physical and mental health of the people. [0003] The wide application of pesticides in the 20th century has become the main technical means of mosquito control. At present, the most widely used mosquito insecticides are mainly pyrethroid chemical insecticides. In view of the continuous development of insec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N63/00A01N25/34A01P7/04
CPCA01N63/00A01N25/34A01N2300/00
Inventor 程治国龚永华赵瑞刘华梅李青姚金武许红
Owner WUHAN KERNEL BIO-TECH CO LTD
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