Mode of Action: Multi-Site Fungicide and Mite Control
Elemental sulphur possesses a unique vapor-phase and contact mode of action that attacks fungal and acarine cell biology at multiple enzymatic sites.
- Multi-Site Biochemical Disruption: Elemental sulphur penetrates fungal cells and acts as an electron acceptor, disrupting mitochondrial respiration and halting core metabolic enzymes.
- Vapor Phase Action: Sulphur vapors volatilize on leaf surfaces, creating a protective micro-zone that inhibits fungal spore germination and penetrates dense plant canopies.
- Acaricidal Efficacy: Highly toxic to phytophagous spider mites, disrupting respiratory membranes and providing simultaneous suppression of two-spotted spider mites.
- Resistance Management (FRAC M02): Classified under multi-site contact group M02; fungal pathogens cannot readily develop resistance to sulphur, making it an ideal tank-mix partner.
Target Crops and Disease Management Spectrum
Sulphur 80% WP is officially approved for a wide spectrum of field crops, plantation orchards, and spices.
- Grapes and Mango: Highly effective for controlling powdery mildew (Erysiphe necator and Oidium mangiferae) on inflorescences, leaves, and young fruits.
- Cumin, Coriander and Spices: Controls powdery mildew (Erysiphe polygoni), safeguarding aromatic seed quality and yield.
- Apple: Manages apple powdery mildew and inhibits phytophagous red spider mite infestations.
- Oilseeds and Pulses: Applied on groundnut, mustard, and soybean to control rust, powdery mildew, and tikka leaf spot while supplying essential sulphate nutrients for oil synthesis.
Application Precautions and Phyto-Toxicity Warnings
While safe on recommended crops, sulphur application requires specific temperature precautions to prevent leaf scorch.
- Temperature Restrictions: Do not spray when ambient field temperatures exceed 30°C to 32°C, as sulphur vaporizes too rapidly and can cause chemical phytotoxicity or leaf burn.
- Oil Compatibility Warning: Maintain a mandatory waiting period of at least 14 to 21 days between sulphur applications and oil-based sprays (such as mineral oils or neem oils).
- Cucurbit Sensitivity: Certain cucurbit varieties (e.g., specific melons and squashes) are sulphur-sensitive; conduct a spot test before treating large plots.
- Water Volume and Coverage: Mix thoroughly into a slurry before filling the spray tank, ensuring complete wetting of foliage.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What diseases does Sulphur 80% WP primarily control?
It primarily controls powdery mildew across crops like grapes, mango, cumin, peas, and apples, and also suppresses spider mites and leaf spot fungi.
Does Sulphur 80% WP provide nutritional value to crops?
Yes, elemental sulphur oxidizes in the presence of soil and plant moisture into sulphate (SO4), supplying essential secondary sulphur that boosts oil content in oilseeds and protein in pulses.
Why should Sulphur 80% WP not be sprayed in high temperatures?
At temperatures above 30°C to 32°C, sulphur volatilizes rapidly, causing phytotoxic leaf scorching, leaf margin curling, and premature fruitlet drop.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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