a) Root rot disease:
- Caused by Gandoderma lucidum
- It causes heavy mortality in Khair plantation raised after clear- felling (estimated upto 45% in first 9 yrs.)
- Spread out by old infected roots to new roots
Symptoms
- Tree becomes yellow.
- Appears white layers in between wood & bark region.
Control measures
- Old root should be dogged out in plantation.
- Isolation trenches 1.5m along across the line including all diseased plant, can be dogged out to control infections.
- Resistant sps. like Semal & Ailanthus can be planted with Khair as mixed plantation.
b) Heart rot disease
- Caused by Fomes badius
- Stem are injured by them.
Symptoms
- Hollowing of bole.
- Becomes yellow spongy after decaying
- Appears ear shaped basidocarp on branches & stem.
Control measures
- Affected trees should be regularly removed in markings
- Sporophores should be collected & burnt
- Reducing source of inoculum by salvage cutting.