Controlling Bacterial Leafspot in Tomato Using Streptomycin Sulphate 90% + Tetracycline Hydrochloride 10% SP
18 May 2025, New Delhi: Tomato cultivation in India faces several biotic stresses, among which Bacterial Leafspot is a significant concern for farmers. This disease, caused by bacterial pathogens, leads to dark, water-soaked lesions on the leaves, which later turn brown and necrotic, severely affecting plant health and yield. One of the effective agrochemical solutions approved under India’s Ministry of Agriculture through the Central Insecticide Bureau is a combination of Streptomycin Sulphate 90% + Tetracycline Hydrochloride 10% SP.
This formulation is not a traditional fungicide but falls under the antimicrobial category. It offers a preventive and curative approach to managing Bacterial Leafspot in tomato crops. Although no specific active ingredient weight in grams is listed in the regulatory data, the application method plays a crucial role in disease control.
The recommended practice involves the use of streptocycline solution ranging from 40 to 100 parts per million (ppm). The solution should be sprayed on seedlings in seedbeds and fields soon after the emergence of the first true leaves. Two crucial applications are advised: one spray before transplanting and another after transplanting. This dual-application technique is designed to offer comprehensive protection during the early and most vulnerable stages of the crop’s life cycle.
The agrochemical’s effectiveness is based on its ability to inhibit bacterial protein synthesis, thereby stopping the spread of infection and allowing the plant to recover and grow healthily. Since this product is specifically targeted at bacterial infections, it is particularly useful in cases where fungal treatments fail to show results.
Currently, no specific dilution in water per hectare or waiting period from the last application to harvest is mentioned in the approved data. However, farmers are advised to consult local agricultural extension officers or agronomists for precise application techniques and safety intervals to ensure compliance with food safety norms.
By integrating this scientifically approved treatment into crop management practices, tomato growers can protect their yield from bacterial damage, reduce losses, and improve the overall quality and marketability of their produce.
Also Read: Two Decades of Bt Cotton in India: A Story of Progress and Persistent Challenges
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