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Isoprothiolane 40% EC: A Synergistic Systemic Fungicide for Paddy Blast


Isoprothiolane 40% EC is a systemic fungicide belonging to the dithiolane group. This chemical exhibits curative and protective actions, making it highly effective in managing fungal diseases. Specifically designed for paddy crops, it is a crucial tool in combating the destructive blast disease. This article elucidates the description, mode of action, recommended dosage, and the notable features and benefits of Isoprothiolane 40% EC.

Description of Isoprothiolane 40% EC 

Isoprothiolane 40% EC is a powerful fungicide that falls under the dithiolane group. It is formulated as an Emulsifiable Concentrate (EC) containing 40% Isoprothiolane as the active ingredient. This chemical offers a systemic mode of action, enabling it to be absorbed through leaves and roots and then translocated both upwards (acropetally) and downwards (basipetally) within the plant’s vascular system.

Mode of Action

The mode of action of Isoprothiolane 40% EC is targeted towards inhibiting bacterial growth within the plant. Once absorbed by the plant, it accumulates within the leaf tissues, acting as a protective shield against bacterial invasion. Additionally, it hinders bacterial metabolism, effectively suppressing their growth. This dual action of inhibiting invasion and hampering bacterial metabolism makes Isoprothiolane 40% EC an effective fungicide in managing bacterial infections.

Crops and Target Pest/Disease

Isoprothiolane 40% EC is primarily formulated for paddy crops, playing a pivotal role in mitigating the blast disease that severely affects paddy plants. Blast is a destructive fungal disease, and paddy crops are highly susceptible to it. The disease targets the aerial parts of the paddy plant, including leaves, stems, and panicles. Isoprothiolane 40% EC effectively controls and manages blast disease in paddy.


  • Target Pest/Disease: Blast of paddy

Dosage and Application

To ensure effective management of blast disease in paddy, the recommended dosage of Isoprothiolane 40% EC is 300 ml per acre. This dosage is a guideline for optimal control and may vary based on specific agricultural and environmental conditions. It is important to follow the instructions provided on the product label and consult with agricultural experts for precise and safe application.

Features & Benefits

Isoprothiolane 40% EC offers a range of features and benefits that make it a preferred choice for paddy blast management.

  1. Synergistic Systemic Fungicide: Isoprothiolane 40% EC is designed to act synergistically within the plant. Its systemic nature ensures effective absorption, translocation, and distribution throughout the plant, providing a comprehensive defense against blast.

  2. Preventive and Curative Application: This fungicide can be applied both preventively and curatively. This flexibility allows for strategic planning in disease management, enabling farmers to address blast outbreaks effectively.

  3. Effective Blast Control: Isoprothiolane 40% EC has demonstrated its efficiency in controlling paddy blast. Its ability to inhibit bacterial growth and metabolism makes it a potent tool in paddy blast management, ensuring healthier and more productive paddy crops.


Isoprothiolane 40% EC stands as a systemic fungicide with remarkable curative and protective actions. Its targeted mode of action against bacterial invasion and metabolism inhibition makes it an invaluable asset in controlling blast disease in paddy crops. Farmers can confidently utilize this fungicide to ensure healthier paddy crops and better yields, contributing to the overall agricultural productivity and food security. Adhering to recommended dosages and best agricultural practices will maximize the benefits of Isoprothiolane 40% EC in paddy blast management.




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