1)BTK 6,000&32000IU/mg WP 2)Quality Certificate by SGS 3)Fine packet or as per requirement 4)Competitive price
Bacillus thuringiensis
Scientific name: Bacillus thuringiensis Berliner
Other names: Bt
Composition: Bacillus thuringiensis is an aerobic spore-forming gram-positive, rod-shaped bacterium, belonging to the family Bacillaceae. At sporulation, in addition to spores, crystals of protein, the delta-endotoxin, are also formed.
Form: Suspended solid in a fermentation broth or spray dried concentrate.
S.g./density: Depends on fermentation materials and procedure.
Solubility: Insoluble in water and organic solvents.
Mode of action: Insecticide with stomach action. Following ingestion, the crystals of endotoxin are solubilised; the epithelial cells of the gut are damaged, insects stop feeding and eventually starve to death.
Use:Bacillus thuringiensis Berliner var. kurstaki is is used extensively in aerial sprays for control of forest defoliators such as gypsy moth, Lymantria dispar (L.), and western spruce budworm, Choristoneura occidentalis Freeman.
Mammalian toxicology:Extensive studies on B. thuringiensis-containing pesticides demonstrate that isolates are not toxic or pathogenic. No adverse effects observed in body weight gain, clinical effects, or on necropsy. Infectivity/pathogenicity studies show that rodents gradually eliminate B. thuringiensis from the body after oral, inhalation or intravenous application. Observed toxicity at high doses is attributed to the vegetative growth stage, not to the insecticidal protein or to the spores. Early formulations, produced from B. thuringiensis subsp. thuringiensis contained a toxic b-exotoxin. See review by US EPA, J. T. McClintock et al., Pestic. Sci., 45, 95 (1995). Some data are given under individual subspp. Toxicity class EPA (formulation) III
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BTK 60000&32000IU/mg WP
