Active Composition and Antibacterial Action
Krosin AG is formulated as a water-soluble powder containing Streptomycin Sulphate (90% w/w) and Tetracycline Hydrochloride (10% w/w).
It acts systemically by binding to bacterial 30S ribosomal subunits in plant vascular systems, inhibiting protein synthesis and halting bacterial multiplication.
This vascular mobility allows it to suppress systemic bacterial infections that contact protectants cannot reach.
- Composition: Streptomycin Sulphate 90% + Tetracycline Hydrochloride 10% SP
- Vascular systemic movement: Rapidly absorbed through leaves to protect expanding vegetative tissues
- Combination synergy: Commonly tank-mixed with copper fungicides for broader disease suppression
Target Crop Diseases and Application Timing
Bacterial pathogens cause severe vascular wilts, foliar lesions, and fruit lesions that cannot be managed by conventional fungicides.
Krosin AG is deployed preventively or at the earliest sign of water-soaked bacterial lesions during warm, humid weather.
- Paddy: Controls bacterial leaf blight (Xanthomonas oryzae pv. oryzae)
- Citrus: Suppresses citrus canker (Xanthomonas axonopodis pv. citri) on foliage and fruit rinds
- Pomegranate & vegetables: Controls bacterial blight (oily spot) and bacterial speck
Mixing, Compatibility, and Resistance Stewardship
Dissolve the required powder completely in clean water before combining with compatible protective copper wettable powders.
To prevent bacterial resistance development, restrict total seasonal applications and adhere strictly to university extension advisories.
- Mixing order: Dissolve Krosin AG completely before adding compatible copper compounds
- Spray timing: Apply during cool morning or evening hours to avoid chemical degradation under direct sunlight
- Stewardship: Avoid indiscriminate prophylactic use to minimize antibiotic resistance risks
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is Krosin AG used for in farming?
Krosin AG is an agricultural bactericide used to manage bacterial diseases such as bacterial leaf blight in rice and citrus canker.
Can Krosin AG be combined with Copper Oxychloride?
Yes, mixing Krosin AG with Copper Oxychloride is widely practiced to provide both systemic antibiotic and contact surface protection.
Does Krosin AG control fungal leaf rust?
No, Krosin AG is specifically an antibacterial formulation with zero efficacy against fungal pathogens.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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