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Loose smut of wheat

This PPT includes introduction, symptoms, Pathogen, life cycle and management of Loose smut of wheat

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Loose smut of wheat

  1. 1. LOOSE SMUT OF WHEAT 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. 2. Loose Smut of Wheat • All wheat growing regions of India • Loss – 30% • Symptoms: • Symptoms appear after ear emergence • Diseased ear emerged first than normal in some varieties • Mostly all ears in a stool affected • Less tillering
  3. 3. • Except awns all parts of ear converted into smut spore • Black powder in ear – covered by slivery membrane • Membrane burst later & smut spore release • Rachis • Group of smut spore called - sorus • ↑ Respiration • ↓ Dry weight of plant
  4. 4. Pathogen – Ustilago segetum Ustilago tritici • Disease is internally seed borne • Pathogen survive in embryo as secondary mycelium • Infection – systemic • Tem. – 23° C • Smut spore – 18 - 20° C • R. H. – 60 - 85%
  5. 5. Systemic Position Kingdom – Mycota/ Fungi Division – Eumycota Sub division – Basidiomycotina Class – Teliomycetes Order – Ustilaginales Family – Ustilaginaceae Genus – Ustilago Species - segetum Fungi Species- tritici
  6. 6. Spores of Ustilago segatum
  7. 7. Disease Management • Use of healthy Seed for sowing. • Seed treatment – Vitavax @ 2.5 gm/ kg seed. • Hot water treatment- (1). Seed dip in cold water – 4 hrs – 64-85° F (2). Seed dip in hot water –132° F-10 minutes (3). Drying of seed • Solar treatment- by Luthra, 1953 In May- June- seed dip in cold water – 8-12 O’clock - 4 hrs seed drying in sun light – 12- 4 O’ clock- 4 hrs • Dis. Res. Var.- DWR-59, PBW- 213, HD- 2221, HD- 2203, Kalyan
  8. 8. Thank You
  9. 9. Thank You

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This PPT includes introduction, symptoms, Pathogen, life cycle and management of Loose smut of wheat

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