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Green ear disease of bajara

This PPt includes Introduction, symptoms, pathogen and management of Green Ear Disease of Bajra/Pearl Millet

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Green ear disease of bajara

  1. 1. GREEN EAR DISEASE OF BAJRA 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. Green Ear Disease of Bajara In India reported by Butler – 1907 Reported from- UP, MP, HR, Delhi, Punjab, Guj., Knt., Maha., TN Loss – till 100% Symptoms: (1). Downey mildew stage on leaves (2). Green ear stage (3). Shoot & bud deformations stage
  3. 3. 1. Downey mildew stage • Plants - yellow, small and weak • Leaves - chlorosis, streaks on leaves • Old leaves affected more than new • Morning- Downey growth on lower surface of leaves • Streaks- brown- shrinking of leaves • On Neocant plants – Downey growth - growth stop and they die
  4. 4. 2. Green Ear stage • No ear formation • If form – leafy structure, hairy • Ear appear as Bunch of Green Leaves so called “Green Ear Disease” • No grain formation - may be partially • Flower parts – glumes, plea, stamens, pistils etc. hypertrophy & proliferation – convert into leafy structures • Later leafy structures - dry and become brown
  5. 5. 3. Shoot and bud deformation • Less tillers formation • Dwarfing & plants look like “Bush” • Because internodes become small • Buds become deform • Auxiliary shoots – proliferate
  6. 6. Casual Organism - Sclerospora graminicola • Pathogen – Obligate parasite • Systemic infection • Sporangophore – di or trichotomous • Soilborne – Oospore • Seedborne - Oospore • R. H. - >75% • Temp. – 15 – 25° C
  7. 7. Systemic Position Kingdom – Mycota/ Fungi Division – Eumycota Sub division – Mastigomycotina Class – Oomycetes Order – Pernosporales Family – Pythiaceae Genus – Phytophthora Species - infestans
  8. 8. Disease Management • Use certified seed • Removal of infected plants • Crop rotation of 5 years • Seed treatment – Thiram- @ 2.5 gm/ kg seed • Spray- Mencozeb @2.5 kg/hec • First spray – 2-3 week after sowing Second spray - at the time of ear formation • Disease resistant varieties- Pusa Moti, HB-1, BBH-4, Pusa-23
  9. 9. Thank You

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This PPt includes Introduction, symptoms, pathogen and management of Green Ear Disease of Bajra/Pearl Millet

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