nine hundred and one
& nbsp;& nbsp;& nbsp; [product name] Bacillus thuringiensis strain
& nbsp;& nbsp;& nbsp; [main ingredients] Bacillus thuringiensis 32000iu/ mg & nbsp;& nbsp; Species: Bacillus, a Gram-positive bacterium that can produce parasporal crystals and spores. Some subspecies can also produce alpha; And β Exotoxin, b-hm-16 vegetative somatic cells are rod-shaped, relatively thick, with a size of 1& nbsp; 2～1.& nbsp; 5μ m× 3. 6～4.& nbsp; 5μ m；& nbsp;& nbsp;< br />
& nbsp;& nbsp;& nbsp; [product properties] this product is yellowish brown powder & nbsp; Bacillus licheniformis high purity powder ≥ 20billion / g, water ≤ 10％。< br />
& nbsp;& nbsp;& nbsp; Product Name: Bacillus thuringiensis (BT) is an English name Bacillus Thuringiensis Abbreviation of. It is an important insect pathogenic bacteria, and also an important topic for the research and development of microbial pesticides in the world< br />
& nbsp;& nbsp;& nbsp; Bacillus thuringiensis BT dosage form: Technical drug, suspension agent, wettable powder& nbsp;< br />
& nbsp;& nbsp;& nbsp; Physical and chemical properties of Bacillus thuringiensis BT:
& nbsp;& nbsp;& nbsp; The effective component of BT parasporal crystal is composed of 2.7-14000 daltons It is composed of three kinds of proteins and has the physical and chemical properties of proteins. Spores, another effective component of BT, are living bacteria If the conditions are suitable, it will germinate, grow and reproduce& nbsp;< br />
& nbsp;& nbsp;& nbsp; Insecticidal Mechanism of Bacillus thuringiensis BT:
& nbsp;& nbsp;& nbsp; There are mainly two kinds of insecticidal active substances of BT, namely crystal and spore Crystal, also known as prototoxin, is a protein. Complete crystals are not active to insects. Only when the crystals enter the midgut through insect feeding, dissolve in the alkaline condition of midgut fluid, and then decompose into smaller molecules toxic peptides through protease, can they be truly pathogenic substances, Toxic peptides destroy insect midgut cells, and intestinal alkaline contents leak into the blood cavity, Spores and bacteria enter the body cavity through the destroyed intestinal wall, and grow and reproduce in it, which eventually led to septicemia and death< br />
& nbsp;& nbsp;& nbsp; In another case, the protein toxin destroys the intestinal wall, resulting in gastrointestinal paralysis, and the pests die under the dual effects of starvation and tissue destruction. However, not all pests have the same acidity and alkalinity in their intestines and stomachs, which is the reason why some pests are sensitive to BT and others are not sensitive to it< br />
& nbsp;& nbsp;& nbsp; Main advantages of BT insecticide:
& nbsp;& nbsp;& nbsp; 1) BT insecticide is safe for humans and animals, but it should avoid contact with eyes and wounds& nbsp;< br />
& nbsp;& nbsp;& nbsp; 2) BT insecticide can be applied for a long time, leading to the harvest season, which is different from other insecticides& nbsp;< br />
& nbsp;& nbsp;& nbsp; 3) It can be used continuously without time interval& nbsp;< br />
& nbsp;& nbsp;& nbsp; 4) BT has specificity in the control of different strains, which is safe for beneficial insects and non target pests& nbsp;< br />
& nbsp;& nbsp;& nbsp; 5) Birds and animals can safely eat pests killed by BT& nbsp;< br />
& nbsp;& nbsp;& nbsp; 6) BT application does not harm plants, pollutes the environment and does not kill harmful natural enemies& nbsp;< br />
& nbsp;& nbsp;& nbsp; 7) No resistance, but pay attention to excessive application of BT& nbsp;< br />
& nbsp;& nbsp;& nbsp; 8) The control effect is good& nbsp;< br />
& nbsp;& nbsp;& nbsp; 9) Easy to use& nbsp;< br />
& nbsp;& nbsp;& nbsp; Why should BT microbial pesticides be used& nbsp;< br />
& nbsp;& nbsp;& nbsp; The development of high-efficiency new preparation of Bacillus thuringiensis against the main pests of vegetables provides a strong guarantee for the production of high-quality agricultural products and pollution-free vegetables in China. The wide application of chemical pesticides has brought about problems such as environmental pollution, pest resistance and the resurgence of pests. Based on the consideration of environmental safety, governments of various countries are competing to adopt measures to limit the use of chemical pesticides and vigorously promote bio pesticides that are biosafety and free of environmental pollution, which makes microbial pesticides, especially BT pesticides, develop rapidly and occupy more and more shares. In recent years, the occurrence trend of Spodoptera exigua and Spodoptera litura in China's major vegetable producing areas has increased year by year. Last year, Spodoptera exigua and Spodoptera litura broke out in some areas, harming almost all vegetables and causing huge losses. In addition, Spodoptera exigua and Spodoptera litura also harmed soybeans, peanuts, corn, cotton and garden plants. Beet armyworm and Spodoptera litura are also very serious in Southeast Asia. At present, chemical agents are mainly used for control, but the control effect in the field is not very significant; However, ecdysteroid insecticides such as beta lactamase and rice mite are easy to produce resistance. The field control effect of conventional BT preparation on Spodoptera exigua and Spodoptera litura is low. It is urgent to develop high-efficiency BT preparations for the control of the above pests, and it has broad market potential and good economic benefits< br />
& nbsp;& nbsp;& nbsp; Application scope and usage:
crop
Control object
Dosage (active ingredient g / HA)
Application method
rice
striped rice borer
1125-1500
Spray
rice
cnaphalocrocis medinalis
750-1500
Spray
rice
Parnara guttata
750-1500
Spray
Vegetables
Diamondback moth
450-750
Spray
Vegetables
Cabbage caterpillar
450-750
Spray
& nbsp;& nbsp;& nbsp; According to different crops, only by mastering the correct use methods can BT pesticides play a greater role in killing insects. Its application technology is as follows:
& nbsp;& nbsp;& nbsp; (1) Vegetables
& nbsp;& nbsp;& nbsp; Main prevention and control: cabbage worm, diamondback moth, bean nymphal moth, leaf miner and night moth< br />
The optimum temperature of application is 20-25 DEG; C. The best time for spraying: in the morning and evening, the dosage is 100-200 g / mu, (emulsion 150-250ml / mu). The control effect can reach 80-90%< br />
In addition, according to the characteristics that rain five hours after BT spraying will promote the efficacy, large amount of spray (150 kg / mu of water for spray per mu of field) can be used in high-temperature season (about 30 DEG; C temperature), and small machine spray is advocated to significantly improve the control effect& nbsp;< br />
& nbsp;& nbsp;& nbsp; (2) Cotton
& nbsp;& nbsp;& nbsp; Main prevention and control: first generation, second generation and third generation cotton bollworm
& nbsp;& nbsp;& nbsp; Dosage: 350-500ml / mu, spray 2-3 times in the peak egg stage (in the era of high insect incidence). The control effect can reach 75-90%, and the bud protection effect is 74%& nbsp;< br />
& nbsp;& nbsp;& nbsp; (3) Corn
& nbsp;& nbsp;& nbsp; Main control: corn borer
& nbsp;& nbsp;& nbsp; Dosage: BT Emulsion 150ml / mu (powder 150g / mu), mix well with fine sand 1.5kg / mu, apply it into the heart leaf at the end of the corn heart leaf, and start spray in the early peak of the corn borer egg, that is, the initial peak period. The control effect can reach 77.3-91.6%< br />
& nbsp;& nbsp;& nbsp; (4) Rice
& nbsp;& nbsp;& nbsp; Main control measures: first generation Chilo suppressalis, third generation Chilo suppressalis, rice bud worm, rice leaf roller
& nbsp;& nbsp;& nbsp; Dosage: 250ml/ mu, the effect is 89-91%. After use, the leaf surface of rice changes from light green to dark green< br />
& nbsp;& nbsp;& nbsp; (5) Gardens, fruit trees
& nbsp;& nbsp;& nbsp; Main prevention and control: stickleback moth, big decline moth, citrus leaf miner stickleback moth and big decline moth are leaf eating pests. Dilute 100-300 times BT emulsion, and spray within a few days after larva hatching, and the control effect can reach 90%. With 300-600 times BT emulsion, the control effect of citrus leaf miner can reach 85%< br />
& nbsp;& nbsp;& nbsp; (6) Forestry
& nbsp;& nbsp;& nbsp; Main control: Masson Pine wool ?, generally not more than 2 hours< br />
& nbsp;& nbsp;& nbsp; (7) This product is a live bacterial preparation with strong bacterial activity. It should be kept in a closed, cool and dark place< br />
& nbsp;& nbsp;& nbsp; (8) It is forbidden to mix with antibiotics, pesticides, fungicides, disinfectants, strong acids and strong bases< br />
& nbsp;& nbsp;& nbsp; [effective date] two years & nbsp;& nbsp;< br />
& nbsp;& nbsp;& nbsp; [package specification] 25 kg / piece (25 bags)
& nbsp;& nbsp;& nbsp; [storage method] sealed in a cool and dry place
