Active Ingredient Chemistry and Multi-Site Action
Polyram delivers reliable surface contact protection with virtually zero risk of fungal resistance buildup.
Key biochemical attributes:
- Active ingredient: Metiram formulated as 70% water-dispersible granules (WG).
- Multi-site enzyme disruptor: Inactivates essential sulfhydryl groups in fungal metabolic enzymes, halting cellular respiration.
- Enriched with elemental zinc: Contains approximately 14 percent bio-available zinc, correcting zinc micro-deficiencies and stimulating chlorophyll synthesis.
- WG granule formulation: Disperses rapidly in water to form a uniform suspension that adheres tenaciously to waxy foliage.
Target Crops and Disease Complex Controlled
Metiram 70% WG is registered under CIBRC guidelines across key commercial fruits and vegetables.
Major registered crop uses:
- Tomato and Potato: Controls early blight (Alternaria solani) and late blight (Phytophthora infestans), keeping foliage green and disease-free.
- Groundnut: Suppresses early leaf spot (Cercospora arachidicola) and late leaf spot (Tikka disease), enhancing pod filling.
- Apple: Provides protective cover against apple scab during pre-bloom and petal fall stages.
- Grapes and Chilli: Controls downy mildew and fruit rot anthracnose on developing berries and pods.
Application Guidelines and Spray Safety
Applying Polyram preventively ensures a durable defensive barrier across plant leaves.
Safe spraying guidelines:
- Preventive application: Apply before disease symptoms appear or immediately upon first visual lesion detection.
- Uniform canopy coverage: Use hollow cone nozzles and adequate water volume to ensure complete coverage of both upper and lower leaf surfaces.
- Tank-mix compatibility: Compatible with major systemic fungicides, insecticides, and water-soluble fertilizers for combined field passes.
- Operator safety: Wear personal protective equipment including rubber gloves, eye goggles, and a protective mask during spray mixing.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
Directorate of Plant Protection, Quarantine & Storage ↗Related on KisanPe
Common questions
What is the active chemical ingredient in Polyram fungicide?
Polyram contains Metiram 70% WG, a broad-spectrum contact protective dithiocarbamate fungicide.
What additional nutritional benefit does Polyram provide to crops?
Polyram contains approximately 14 percent elemental zinc, delivering a phytotonic greening effect and correcting zinc deficiencies.
Why is Polyram valuable in anti-resistance fungicide schedules?
Because metiram possesses a multi-site mode of action, target fungal pathogens cannot easily mutate to develop chemical resistance.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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