Katyayani Samhar (Bt Bio Larvicide)
Katyayani Samhar is a liquid bio-insecticide containing Bacillus thuringiensis, effective for controlling various insect larval pests through ingestion. The active compound disrupts the gut of larvae, leading to internal tissue damage, cessation of feeding, and eventual death.
Target Pests of Bt Bio Larvicide
Katyayani Samhar targets a wide range of larval pests, including:
- Caterpillars and Borers: Tobacco caterpillar, corn borer, stem borer, fruit borer, pod borer, shoot borer, rice leaf roller, leaf-eating caterpillar.
- Cotton Pests: Cotton bollworm, cotton bridgeworm.
- Tea and Tree Pests: Tea caterpillar, pine caterpillar, spiny moths.
- Additional Pests: Lepidoptera, Hymenoptera, Diptera, Coleoptera pests like tea loopers and other caterpillars.
Target Crops of Bt Bio Larvicide
This bio larvicide is highly effective for crops such as:
- Field Crops: Cotton, paddy, chickpea, gram, pigeon pea, soybean, tobacco, castor, red gram.
- Vegetables: Cabbage, okra, tomato, cauliflower, chili, brinjal, onion, garlic.
- Fruit Crops: Tomato, watermelon, pineapple, grapes, and various other fruit and horticultural crops.
Mode of Action
Katyayani Samhar’s mode of action involves:
- Spore Ingestion: Insect larvae consume plant material containing Bacillus thuringiensis spores.
- Spore Activation: The alkaline environment in the larvae’s midgut dissolves the spores, releasing protein crystals.
- Protoxin Activation: Gut enzymes convert the crystals into active protoxins (Bt toxins).
- Binding to Midgut Cells: Toxins attach to receptors on midgut cells.
- Pore Formation: Toxins insert into cell membranes, creating pores.
- Cell Lysis: Pores cause cell rupture, disrupting the digestive system.
- Death of Insect: The damaged gut leads to starvation and death.
Application and Dosage
- Gardening Use: 5-10 ml per liter of water.
- Agricultural Use: 1-2 liters per acre, applied via spraying.
Precautions
- Apply 2-3 days before chemical pesticides for optimal control.
- Best results when temperatures are above 18°C; ideally applied in the evening, with maximum efficacy at temperatures above 30°C.
- Regular application every 10-15 days for continuous pest control.
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