Green ear disease of bajara

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

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: [email protected], [email protected]
Cell No. 91-9456613374

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. 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. 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

8. 3. Shoot and bud deformation
•Less tillers formation
•Dwarfing & plants look like “Bush”
•Because internodes become small
•Buds become deform
•Auxiliary shoots – proliferate

10. Casual Organism - Sclerospora graminicola
•Pathogen – Obligate parasite
•Systemic infection
•Sporangophore – di or trichotomous
•Soilborne – Oospore
•Seedborne - Oospore
•R. H. - >75%
•Temp. – 15 – 25° C

11. Systemic Position
Kingdom – Mycota/ Fungi
Division – Eumycota
Sub division – Mastigomycotina
Class – Oomycetes
Order – Pernosporales
Family – Pythiaceae
Genus – Phytophthora
Species - infestans

12. 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

13. Thank You