Black Gram Disease — Blackgram D6
- Numerous spots with pale brown centre and reddish brown margin on leaves, branches and pods
- Defoliation during flower and pod formation
- Uredospores - globose or ellipsoid, single celled, yellowish brown with echinulations
- Teliospores - unicellular, globose or elliptical, pedicellate, chestnut brown in colour
- Pycnia appear on the upper surface of the leaf
- Aecia - cup shaped and orange coloured
- Aeciospores - unicellular, ellipsoid minutely, and verrucose
- Survival: In soil as teliospores and on crop debris as uredospores
- The fungus also survives on other legume hosts (beans, cowpea, etc.,)
- Primary spread: Sporidia
- Secondary spread: Wind -borne uredospores
- Temperature: 21 to 26°C
- Heavy dew during night hours
- Long day hours
- Spray any one of the following fungicides at initiation of disease. If necessary, repeat the spray 15 days later.
