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Bacillus thuringiensis(Bti)
Bacillus thuringiensis(Btk)
Bacillus sphaericus
Bacillus licheniformis
Bacillus subtilis
Insect Virus
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Bacillus thuringiensis(Btk)
發布日期:2011/7/14    瀏覽次數:6765

Bacillus thuringiensis (Bt) is a naturally occurring bacterial disease of insects. These bacteria are the active ingredient in some insecticides. Bt is considered safe to people and nontarget species, such as wildlife. Some formulations can be used on essentially all food Crops. The greatest use of Bt involves the kurstaki strain used as a spray to control caterpillars on vegetable Crops.

Bt acts by producing proteins (delta-endotoxin, the 'toxic crystal') that reacts with the cells of the gut lining of susceptible insects. These Bt proteins paralyze the digestive system, and the infected insect stops feeding within hours. Bt-affected insects generally die from starvation, which can take several days. 
 Introduction to Preparation

1.  Effective Ingredient
The production strains of Bacillus thuringiensis were isolated from the soil at the suburb. The effective ingredient of this production is toxic protein that consists of spore, cell wall etc. The strain of var. kurstaki(Btk) can be used in the field of vegetables, rice, corn to control Lepidoptera such as Plutella xylostella, Spodoptera littoralis, etc.
2.  Process of product
The preparation is produced by the ferment technology of Bacillus thuringiensis. After fermentation, the fermented liquid was compressed, and become the suspension preparation or wettable powders.
Character of Biology, Physics and Chemistry
1.  Character of Biology
Bacillus thuringiensis exists in natural word widely. It is toxic to the worms of Lepidoptera and larvae of mosquitoes and does no harm to other organisms. In the precession of forming spore, germ produces a kind of protein that can be digested by mid-gut enzyme after swallowed by larvae and becomes toxic to larvae.
2. Character of physics Chemistry
The liquid preparation is suspension in light brown color with little sauce or no smell. Its pH is 4.0 to 5.0 and specific gravity is 1.04. The suspension is uniform and stable in prime temperature and can be store for 1 year. The bio-potency of the preparation is 8000 IU/mg.
The powders preparation is in light brown color. Its PH is 5.0~6.0. The powder is uniform and stable in prime temperature and can be store for 2 year. The bio-potency of the preparation of Bacillus thuringiensis var. kurstaki(Btk) is 16000 IU/mg and 32000 ITU/mg.
Using mothed
Bacillus thuringiensis can be used in vegetable crops and horticulture. Start with first spray early, before first sign of infestation occurs, and repeat spray if necessary after 3 days.
Spray to let solution run of the plant. Spray early in the morning of late in the afternoon to get maximum performance of product.
 
1. Bacillus Thuringiensis 8000IU/mg SC
 
Trade Name: Bacillus Thuringiensis 8000IU/μl SC
Common Name: Bacillus Thuringiensis
Strain: B. thuringiensis subsp. kurstaki
Formulation: 8000IU/μl SC
Characteristics: Palm yellow and brown with characteristics odor
Function: Bacillus thuringiensis (Bt), initially characterized as an insect pathogen, is an ubiquitous gram-positive spore-forming bacterium that forms a parasporal crystal during the stationary phase of its growth cycle. The parasporal crystal containing insecticidal crystal proteins (ICPs), called δ-endotoxins, are protoxins and have no insecticidal activity. The action mechanism of these endotoxins involves solubilization in the insect midgut, proteolytic processing and cleavage to smaller insecticidal Cry proteins by midgut proteases, binding of the Cry toxins to midgut epithelial cell surface receptors, inducing pore formation, resulting in an osmotic imbalance of the midgut epithelia that leads to cell lysis, gut paralysis and larval death. The series of our Bt products have the features with: high efficiency, broad spectrum, safe, economic, no pollution, and no resistance from pests and protection the natural enemy of the pest, It is the first and best choice for Lepidoptera pests control.

Uses and Dosage:

Target Pest

Rates(a.i.ml/ha.)

Applying time

Methods of

application

Usual

Better

Cabbage lopper, rice leaf roller, geometrid and so on

1125-2250

1500-3000

Spraying to coincide with egg hatch

Diluted with 750kg water,

spraying

Diamondback moth, pine caterpillar, common tobacco worm

1125-2250

1900-3800

Cotton boll worm, rice stem borer

1125-2250

1900-3800

Corn borer

1125

1500

Storage:  Keep it sealed, store in dry and cool place and avoid light.
Shelf Life: 18 Months
Caution: 1. High poisonous to silkworm. 2. Do not use together with bactericide or alkaline pesticide
Package: 5L/drum, 4 drum/carton
 
2. Bacillus Thuringiensis 16000IU/mg WP
 
Trade Name: Bacillus Thuringiensis 16000IU/mg WP
Strain: B. thuringiensis subsp. kurstaki
Formulation: 16000IU/mg WP
Characteristics: Light yellow or light brown powder with characteristics odor
Function: Bacillus thuringiensis (Bt), initially characterized as an insect pathogen, is an ubiquitous gram-positive spore-forming bacterium that forms a parasporal crystal during the stationary phase of its growth cycle. The parasporal crystal containing insecticidal crystal proteins (ICPs), called δ-endotoxins, are protoxins and have no insecticidal activity. The action mechanism of these endotoxins involves solubilization in the insect midgut, proteolytic processing and cleavage to smaller insecticidal Cry proteins by midgut proteases, binding of the Cry toxins to midgut epithelial cell surface receptors, inducing pore formation, resulting in an osmotic imbalance of the midgut epithelia that leads to cell lysis, gut paralysis and larval death. The series of our Bt products have the features with: high efficiency, broad spectrum, safe, economic, no pollution, and no resistance from pests and protection the natural enemy of the pest, It is the first and best choice for Lepidoptera pests control.

Uses and Dosage:

Crops

Target Pests

Rates (a.i.g/ha.)

Methods of Application

Cruciferae Vegetable

Green Cloverworm

375-750

Spray

Diamondback Moth

750-1125

Spray

Cotton

Cotton Boll Worm

1500-2250

Spray

Paddy

Rice Leafroller

1500-2250

Spray

Forest

Pine Caterpillar

470-630

Spray

Corn

Corn Borer

750-1500

Fill to trumpet with sand

Tobacco

Tobacco Worm

750-1500

Spray

Tea plant

Tea Caterpillar

470-630

Spray

Jujube

Inchworm

470-630

Spray

Storage: Keep it sealed, store in dry and cool place and avoid light.

Shelf Life: 24 Months

Caution: 1. High poisonous to silkworm. 2. Do not use together with bactericide or alkaline pesticide

Package: 25Kg/drum

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