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Karnal bunt of wheat
Karnal bunt of wheat is a fungal disease caused by Tilletia indica. It was first reported in India in 1931. Symptoms appear in the ear and include black powdery spores partially covering some grains, giving them a rotten fish smell. Spores can later burst and spread via air, soil, and seed. Disease management includes using disease-free seed, seed treatment, crop rotation, summer plowing, green manuring, avoiding irrigation at flowering, and spraying fungicides. Tolerant wheat varieties include PBW-154, PBW-533, HD-2227, C-306, and UP-368.
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Karnal bunt of wheat
- 1. KARNAL BUNT OFWHEAT DR. RAJBIR SINGH Assistant Professor Department of Plant Pathology Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India Affiliated to Ch. Charan Singh University, Meerut (UP), India Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com Cell No. 91-9456613374
- 2. Karnal Bunt ofWheat • Reported in1931 – by Mitra form Karnal , India • Sever in Trai & northern parts of country • Symptoms: • Symptoms appear in ear • Not all ear in a stool affected • Not all grains in a ear • Not whole grain but partially • So called Partial Bunt
- 3. • Black powderof spore - • Bunt spore are covered by pericarp • Later brust & spores spread in environment • Rotten fish smell – Trimethyl amine • Grains – light, low quality & low market value
- 5. Pathogen – Tilletiaindica Neovossia indica • Bunt spore are – reticulate & size 22 - 49 µm • Disease is soil, air & seed borne • Chlamydospore • Fav. - Tem. 18 - 22° C • R. H. – >70%
- 6. Systemic Position Kingdom –Mycota/ Fungi Division – Eumycota Sub division – Basidiomycotina Class – Teliomycetes Order – Ustilagiales Family – Tilletiaceae Genus – Nevossia Species - indica
- 7. Different Types ofSpores of Nevossia indica
- 8. Spore of Nevossiaindica
- 10. Disease Management • Useof healthy Seed • Seed treatment – Bvastin or Thiram @ 2.5 – 3. 0 gm/ kg seed • Crop rotation • Summer ploughing • Green manuring • No irrigation at the time of flowering • Spray – Tilt @ 0.1% or Bavastin @ 0.2% at boot leaf stage • Use disease tolerance varieties- PBW- 154, PBW- 533, HD- 2227, C-306, UP-368
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