Pyraclostrobin 20% WG Fungicide Uses

Pyraclostrobin 20% WG is a broad-spectrum fungicide from the strobilurin (QoI) chemical group, registered for use in India under the Insecticides Act, 1968, formulated as water-dispersible granules (WG). It is registered for the control of early blight in tomato, frog eye leaf spot and Alternaria leaf spot in soybean, Alternaria leaf blight in cotton, tikka disease in groundnut, turcicum leaf blight in corn (maize), Sigatoka leaf spot in banana and anthracnose in chilli. 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 fungicide uses (Government of India).

Which Problem Is This For? (Symptom Guide)

Not sure whether what you're seeing in the field matches this fungicide's use case? This guide helps match symptoms to this fungicide's approved crop-wise uses.

Mode of Action

Pyraclostrobin belongs to the strobilurin (QoI, quinone outside inhibitor) group of fungicides — FRAC Group 11. It binds to the cytochrome bc1 complex at the Qo site in fungal mitochondria and blocks electron transfer during respiration, cutting off the energy (ATP) supply of the fungal cell. This stops spore germination and the growth of fungal threads on and inside the leaf. Pyraclostrobin has strong preventive action with translaminar movement into the leaf, giving protection on both leaf surfaces and residual activity against a wide range of leaf-spot, blight and anthracnose fungi.

Features & Benefits

• Registered across vegetable, oilseed, fibre, cereal and fruit crops — tomato, soybean, cotton, groundnut, corn, banana and chilli.
• Broad-spectrum control of leaf spots, blights, tikka, Sigatoka and anthracnose from a single fungicide.
• Strong preventive action with translaminar movement and residual protection on the leaf.
• Strobilurin (FRAC Group 11) mode of action is a useful rotation partner with triazole and multi-site fungicides in a resistance-management programme.
• Water-dispersible granule (WG) formulation — low dust, easy to measure and mixes readily in water.

Recommended Usage of Pyraclostrobin 20% WG Fungicide

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) and rounded. CIB&RC figures (a.i. / formulation / water per ha / waiting period): tomato early blight 75–100 g / 375–500 g / 500 L / 3 days; soybean frog eye leaf spot (Cercospora) and Alternaria leaf spot 75–100 g / 375–500 g / 500 L / 26 days; cotton Alternaria leaf blight 100 g / 500 g / 500 L / 14 days; groundnut tikka disease 100 g / 500 g / 500 L / 29 days; corn turcicum leaf blight 100 g / 500 g / 500 L / 40 days; banana Sigatoka leaf spot 150 g / 750 g / 500 L / 103 days; chilli anthracnose 100 g / 500 g / 500 L / 3 days. Always confirm the current dose on your specific product's label before use.

How to Use

1. Identify the disease from the symptom guide above and confirm the dose and water volume from the table.
2. Measure the required quantity of granules, dissolve them first in a small quantity of water, then add the solution to the spray tank and top up to the full volume while stirring.
3. Spray uniformly to cover the whole crop canopy, including the lower leaves where early blight, tikka and turcicum blight usually start; in banana, cover the young leaves well.
4. Spray preventively when the weather favours disease, or at the first appearance of symptoms — strobilurins work best before the disease is established.
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 spray mist.
• Resistance to strobilurin (QoI, FRAC Group 11) fungicides is a known problem because of their single-site action; do not make back-to-back sprays on the same crop, and rotate or tank-mix with fungicides from a different FRAC group.
• Respect the waiting period (PHI) before harvest given in the table above — 3 days for tomato and chilli, 14 days for cotton, 26 days for soybean, 29 days for groundnut, 40 days for corn and 103 days for banana.
• Highly toxic to fish and aquatic life — 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.