|
Disease
|
Stage
|
Symptoms
|
Season
|
Causes
|
| Blast |
All growth stages |
Leaf lesions- Grey Centers large in the middle tapering
to ends. Also attacks stem nodes. |
Mostly wet cloudy skies Frequent rain and drizzle |
High Nitrogen levels,
High relative humidity |
| Sheath
Blight |
Tillering |
Leaf sheath – Grayish green lesions between the veins
and the leaf blade |
Periodic |
High temperature and humidity
High levels of N, |
| Bacterial Leaf Blight |
Tillering to heading |
Leaf lesions run along the length of the leaf |
Wet |
High temperature
and humidity |
| Sheath Rot |
Boot leaf |
Small water soaked lesions on leaves |
Periodic |
High temperature and humidity |
| Brown Spot |
Flowering to maturity |
Brown round to oval spots on leaves |
Periodic |
25-30 0C temp & High humidity |
| False smut |
Flowering and maturity |
Ovaries transformed to large green masses |
Periodic |
Rainfall accompanied
by cloudy days |
| Tungro virus |
Flowering and maturity |
Stunting of the plant & yellow to orange laves |
Periodic |
Usage of more N and
more vector activity |
