Important Diseases of Tobacco
1. Mosaic (virus)
2. Powdery Mildew
3. Leaf curl (rosette disease)
4. Orobanche (parasite on tobacco)
1. It is viral disease.
2. Light – green streaks are found on leaves and mottling of leaves take place.
1. Removal and destructing of diseased plants.
2. Follow clean cultivation.
2. Powdery Mildew:
1. White powdery or ash coloured patches appears on the leaves which later on turn brown.
2. Older leaves attacked first.
3. In sever case there is reduction in quality and quantity of the leaf yield.
1. Removal of lower leaves.
2. Avoid over fertilizing.
3. Application of sulphur to the soil around the plant @ 45 kg/ha.
3. Leaf Curl:
1. It is a viral disease.
2. The curling and puckering of leaves take place.
3. Reduction in leaf size and short internodes are found in infected plant.
1. Removal and destruction of the affected plants.
2. Control of vectors by spraying suitable insecticide.
4. Orobanche (Bambakhu):
1. Bambakhu is a root parasite of tobacco crop.
2. It absorbs the nutrients and water from tobacco plants due to which chlorosis of leaves take place.
3. The leaves remain small in size and ultimately affects the quantity and quality of leaves.
4. It is mostly found in irrigated tobacco.
It is controlled by removing orobanche shoots before flowering or seed setting.