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Wheat Rusts

Puccinia striiformis (stripe/yellow rust), P. triticina (leaf/brown rust), P. graminis (stem/black rust) गहुँमा लाग्ने सिन्दुरे रोगहरु
  • Use resistant varieties Stripe rust: Pasanglhamu, WK1204, Dhaulagiri, Danphe, Gautam, Tilottama Leaf rust: BL1473, Bhrikuti, Achyut, NL971, Aditya, Gautam, Bijaya, Gaura, Bhrikuti, Dhanphe, Tilottama Stem rust: Dhaulagiri, Danphe, Bijaya, Tilottama, Gaura
  • Grow more number of varieties having different resistant genes to rust pathogens.
  • Practice early planting - In mid hills: before Kartik 15 (before November). In valleys: before first week of Mangsir (mid November).
  • Avoid dense planting, and follow line sowing.
  • Use recommended dose of chemical fertilizers (100:60:40 NPK kg per hectare).
  • Remove self-grown, volunteer wheat plants around the field.
  • Remove barberry plants nearby wheat fields, if possible.
  • Monitor the plants regularly from seedling stage at alternate day.
  • Yellow rust: The appearance of yellow streaks (pre-pustules), followed by small, bright yellow, elongated uredial pustules arranged in conspicuous rows on the leaves, leaf sheaths and glumes.
  • Leaf rust: Circular or oval, orange pustules on the upper surface of infected leaves. Pustules are more scattered and larger in size compared to stripe rust.
  • Black rust: Uredinia are orange to dark red in colour and form on both surfaces of leaves. They are elliptical to elongate and are larger than those of leaf and stripe rusts.
  • Look for appearance of any rust pustule in the field; confirm it by rubbing the pustule slightly with fingers on leaves, stems and glumes. The spores within these pustules are easily dislodged with yellow orange for yellow rust, orange for leaf rust and dark red for stem rust.
  • As wheat ripens, the uredinial stage turns into a new stage known as the telial stage.
  • Treat seed with triadimenol @ 2.5 g per kg seed, if the variety is susceptible to rust. Spray propiconazole 25% EC @ 1 ml or triadimefon 25 WP @ 1 g/litre of water when specific rust pustules are observed on known susceptible varieties.
  • Use personal protection equipment (PPE) while using fungicides. Propiconazole, triadimenol and triadimefon fall in WHO list II. Propiconazole and triadimefon have waiting period of at least 15 days.
AUTHOR(S): Suraj Baidya (NARC), Prakash Paudel (NPQP), Hira Kaji Manandhar (Ex-NARC)

PRODUCED BY: Plantwise

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