Thiodicarb 75% WP Insecticide Uses

Thiodicarb 75% WP is a carbamate (oxime carbamate) insecticide registered for use in India under the Insecticides Act, 1968, formulated as a wettable powder (WP) for foliar spraying. It is registered for the control of caterpillar pests — diamondback moth in cabbage, bollworms in cotton, shoot and fruit borer in brinjal, fruit borer in chilli, and pod borers in blackgram (urad) and pigeon pea (arhar). This page lists its mode of action, key benefits and the recommended dosage as per the Central Insecticides Board & Registration Committee (CIB&RC) official list of approved insecticide uses (Government of India).

Which Problem Is This For? (Symptom Guide)

Not sure whether the damage in your field matches this insecticide's use case? This guide helps match what you see in the field to this insecticide's approved crop-wise uses.

Mode of Action

Thiodicarb is an oxime carbamate insecticide (IRAC Group 1A, acetylcholinesterase inhibitors). It blocks the enzyme acetylcholinesterase in the insect's nervous system, so the nerve-signal chemical acetylcholine builds up, nerves keep firing, and the insect becomes paralysed and dies. It acts mainly as a stomach poison on caterpillars that feed on treated leaves, fruits and pods, and also has ovicidal activity on eggs of some caterpillar pests.

Features & Benefits

• Stomach action on caterpillar pests — diamondback moth, bollworms, fruit borers and pod borers — on the registered crops.
• Also acts on eggs of some caterpillar pests, helping reduce the next generation.
• Carbamate mode of action (IRAC Group 1A) is a rotation option with pyrethroid, diamide and spinosyn insecticides for resistance management.
• Wettable powder mixes into a uniform suspension in water for spraying.

Recommended Usage of Thiodicarb 75% WP Insecticide

The table below gives the recommended dose, water volume and waiting period per acre, converted from the CIB&RC-registered per-hectare rate — see the note below the table for conversion details. Always confirm against the current product label before use.

Figures above are converted from the CIB&RC-registered per-hectare rate (1 ha ≈ 2.47 acres): cabbage 750–1000 g a.i./1000–1330 g formulation/ha in 500 L water/ha, waiting period 7 days; cotton 750 g a.i./1000 g/ha in 500 L/ha, waiting period 30 days; brinjal 470–750 g a.i./625–1000 g/ha in 500 L/ha, waiting period 6 days; chilli 470–750 g a.i./626–1000 g/ha (as printed) in 500 L/ha, waiting period 6 days; blackgram 468–562 g a.i./625–750 g/ha in 375–500 L/ha, waiting period 17 days; pigeon pea 470–750 g a.i./625–1000 g/ha in 500 L/ha, waiting period 30 days. Always confirm the current dose on your specific product's label before use.

How to Use

1. Identify the pest from the symptom guide above and confirm the dose from the table.
2. Weigh the required quantity of powder, make a smooth paste or slurry in a small quantity of water first, then add it to the spray tank and top up to the full volume while stirring; keep stirring during spraying.
3. Spray uniformly over the crop with a knapsack or power sprayer, covering both sides of the leaves, flowers, fruits, bolls and pods.
4. Spray at egg-laying or when young larvae are first seen, or at the crop stage advised by your local agricultural extension office.
5. Spray in calm weather in the early morning or late evening, and avoid spraying if rain is expected within a few hours.

Precautions & Safety

• Wear appropriate PPE — mask/respirator, gloves, goggles and full-sleeved clothing — while mixing and spraying, and avoid inhaling the powder or spray mist.
• Follow the recommended dose strictly; do not mix with other pesticides unless specifically recommended.
• Respect the waiting period (PHI) before harvesting the treated crop: 6 days for brinjal and chilli, 7 days for cabbage, 17 days for blackgram and 30 days for cotton and pigeon pea.
• Thiodicarb is a carbamate (cholinesterase inhibitor) — if anyone feels dizzy, has blurred vision, sweating, nausea or excess salivation during or after spraying, stop work, move them to fresh air and get medical help immediately, showing the product label.
• Avoid spraying when bees are actively foraging on flowering crops.
• Do not let spray wash or field water reach ponds, fish tanks, streams or drinking-water sources.
• Store in the original, tightly closed container in a cool, dry place away from direct sunlight, food and feed, and out of reach of children and livestock.
• Wash hands, face and any exposed skin thoroughly with soap and water after spraying, and change out of contaminated clothing before eating, drinking or smoking.

Brand names mentioned on this page are registered trademarks of their respective owners and are referenced here for identification purposes only; FarmMate is not affiliated with or endorsed by these brands. This page is for general information only — always consult your local agricultural extension office and confirm the current product label before use.