Chlorothalonil 75% WP is a broad-spectrum, non-systemic, contact fungicide formulated as a wettable powder (WP). It is widely used to prevent and control various fungal diseases, specifically leaf spots, blights, rusts, and downy mildews in fruits, vegetables, and ornamental plants. Key Product Features:
Mode of Action: Multi-site contact fungicide, which makes it effective at preventing resistance development. It inhibits spore germination and disrupts fungal metabolism by attacking multiple enzymatic sites.
Preventive Action: It forms a protective barrier on the plant's surface that prevents fungal infection. It is most effective when applied preventively before the disease takes hold.
Formulation: Wettable powder (75% WP) that easily disperses in water for even spraying.
Residual Activity: Provides long-lasting protection (approx. 7–14 days) due to good adherence to the leaf surface.
Rainfastness: Contains agents that improve adhesion, reducing washing off during rain.
Common Target Crops and Diseases:
Potato/Tomato: Early and Late Blight.
Groundnut: Tikka leaf spot and Rust.
Grapes: Anthracnose and Downy mildew.
Chilli: Fruit rot.
Ornamentals/Turf: Leaf spots, Dollar spot.
Dosage and Usage:
Dosage: Typically applied at a rate of 1.0–2.0 grams per liter of water, or roughly 500-1000 gm per hectare depending on the crop.
Timing: Should be applied at the first sign of disease or when weather conditions favor disease development.
Safety and Handling:
Toxicity: Highly toxic to fish and aquatic invertebrates; it should be kept away from water bodies.
PPE: Requires protective clothing, gloves, and a mask during application.
Compatibility: Generally compatible with most insecticides and fungicides, but should not be mixed with oil-based formulations to avoid plant damage.