Chemical profile and QoI mitochondrial mode of action
Pyraclostrobin belongs to the methoxycarbamate / strobilurin group (FRAC Group 11).
Key biochemical properties:
- Active ingredient: Pyraclostrobin (available as standalone 20% WG formulations or premixes).
- Mitochondrial Complex III inhibition: Binds to the Qo site of cytochrome bc1 complex, halting ATP energy synthesis and causing fungal mortality.
- Inhibition of spore germination: Extremely effective at preventing fungal spore germination, germ tube elongation, and appressorium formation.
- Translaminar and translaminar movement: Moves through leaf tissue and redistributes across foliage surfaces, resisting wash-off from rainfall.
- Plant health benefits: Enhances nitrate reductase enzyme activity, reduces ethylene stress hormone synthesis, and prolongs leaf greening.
Target plant diseases and registered crop applications
Pyraclostrobin is registered by the Central Insecticides Board for major fungal blights and leaf spots:
Primary target diseases:
- Soybean: Anthracnose, Cercospora leaf spot, and Rhizoctonia aerial blight.
- Chilli: Anthracnose fruit rot (Colletotrichum capsici) and powdery mildew.
- Tomato and Potato: Early blight (Alternaria solani) and late blight suppression.
- Apple and Grapes: Scab, powdery mildew, and anthracnose.
- Pigeon Pea (Arhar): Cercospora leaf spot and early pod blight.
Application timing, dosage and resistance management
Apply Pyraclostrobin preventatively prior to disease development or at early infection onset according to CIBRC-approved product label rates (typically 150 to 200 grams per acre for 20% WG formulations in 200 litres of water). Because strobilurins act on a single target site, limit consecutive sprays to prevent fungal resistance, and rotate with multi-site contact protectants. Applicators should wear rubber gloves and protective masks.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What chemical class does Pyraclostrobin belong to?
Pyraclostrobin belongs to the strobilurin / QoI class (FRAC Group 11) of fungicides.
What are the physiological plant health benefits of Pyraclostrobin?
It stimulates nitrate reductase activity, decreases ethylene stress synthesis, and extends leaf greening for enhanced photosynthesis.
Which crops are approved for Pyraclostrobin application in India?
It is approved by CIBRC for soybean, chilli, tomato, potato, apple, grapes, and pulses.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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