Active Composition and Antibacterial Mechanism
Streptocycline is a soluble powder formulation combining Streptomycin Sulphate (90 percent w/w) and Tetracycline Hydrochloride (10 percent w/w).
It acts systemically within plant vascular systems by binding to bacterial 30S ribosomal subunits, inhibiting bacterial protein synthesis and preventing pathogen multiplication.
- Composition: Streptomycin Sulphate 90% + Tetracycline Hydrochloride 10% SP
- Systemic uptake: Rapidly absorbed through leaves and translocated to protect expanding vegetative tissues
- Synergistic tank mix: Frequently combined with copper fungicides (such as Copper Oxychloride) for broader disease coverage
Registered Diseases and Target Crops
Bacterial pathogens cause severe vascular wilt, foliar lesions, and fruit lesions that cannot be managed by conventional fungicides alone.
Streptocycline is registered to combat bacterial blights and canker complexes across key horticultural and cereal crops.
- Paddy: Controls bacterial leaf blight (Xanthomonas oryzae) and bacterial leaf streak
- Citrus: Manages citrus canker (Xanthomonas axonopodis pv. citri) on leaves and fruit rinds
- Pomegranate and Tomato: Controls bacterial nodal blight (oily spot) and bacterial speck
Preparation, Dosage Leaflet, and Antimicrobial Stewardship
Dissolve the required quantity in a small volume of water before adding to the sprayer tank to ensure complete dissolution.
To prevent antimicrobial resistance, apply only when disease symptoms appear and limit total seasonal applications as advised by university extension guidelines.
- Mixing order: Dissolve Streptocycline completely before mixing with compatible copper wettable powders
- Spray timing: Apply during morning hours or cloudy weather to avoid rapid chemical breakdown under intense solar heat
- Stewardship: Avoid indiscriminate prophylactic sprays to minimize bacterial resistance risks
Official source
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Central Insecticides Board & Registration Committee ↗Related on KisanPe
Common questions
What is Streptocycline used for in agriculture?
It is used as an agricultural bactericide to control bacterial diseases such as bacterial leaf blight in rice and citrus canker.
Can Streptocycline be mixed with Copper Oxychloride?
Yes, growers commonly tank-mix Streptocycline with Copper Oxychloride to provide both systemic antibiotic and protective contact action.
Does Streptocycline control fungal rust or powdery mildew?
No, Streptocycline is exclusively an antibacterial formulation and has no 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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