Active ingredient and multi-site protective mode of action
Polyram contains Metiram formulated as modern water-dispersible granules (WG) with high suspension stability.
Key technical features:
- Active chemistry: Metiram 70% WG (FRAC Group M03).
- Multi-site inhibition: Dissects multiple enzymatic pathways in fungal cells, disrupting energy production, cell membrane function, and spore respiration.
- Spore germination prevention: Forms an active protective barrier across leaf surfaces, preventing fungal zoospores and conidia from penetrating leaf tissue.
- Nutritional zinc contribution: Formulated with approximately 14% elemental zinc, which promotes auxin synthesis, leaf greening, and physiological vitality.
- Excellent rainfastness: High-quality WG formulation ensures strong adherence and even coverage, resisting wash-off during light rainfall.
Target diseases and registered crop spectrum
Polyram is registered by the Central Insecticides Board for preventative control of key plant diseases:
Approved crop applications:
- Potato: Early blight (Alternaria solani) and late blight (Phytophthora infestans).
- Tomato: Early blight, Septoria leaf spot, and fruit rot.
- Chilli: Anthracnose dieback and fruit rot.
- Apple and Grapes: Scab, downy mildew, and black rot protection.
- Groundnut: Tikka leaf spot disease management.
Dosage guidance and spray recommendations
Polyram must be applied protectively prior to disease establishment or immediately when weather conditions favor fungal development. Follow CIBRC-approved product label rates (typically 800 to 1200 grams per acre depending on crop and foliage volume) mixed in adequate water. Always wear personal protective gear, avoid spraying during windy conditions, and observe recommended pre-harvest intervals.
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 is the technical ingredient in Polyram fungicide?
Polyram contains Metiram 70% WG, a multi-site dithiocarbamate contact fungicide.
Does Polyram provide zinc nutrition to crops?
Yes, Metiram contains approximately 14% zinc, which supports plant metabolism, leaf chlorophyll, and vegetative vigour.
Can Polyram be used for managing potato late blight?
Yes, it is widely used as a preventative spray to protect potato foliage against early and late blight infections.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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