hi
Hi
It might be leaf blotch or leaf spot
Leaf blotch
The disease is caused by Taphrina maculans.
Symptoms
It appears as small, oval, rectangular or irregular brown spots on either side of the leaves which soon become dirty yellow or dark brown.The leaves also turn yellow.
In severe cases the plants present a scorched appearance and the rhizome yield is reduced.
Management
The disease can be controlled by spraying the plants with mancozeb 0.2%.
Leaf spot
The disease is caused by Colletotrichum capsici.
Symptoms
It appears as brown spots of various sizes on the upper surface of the young leaves.The spots are irregular in shape, whitish or grayish in the centre.
Later two or more spots may coalesce and form an irregular patch covering almost the whole leaf.
The affected leaves eventually dry up.
The rhizomes do not develop well.
Management
The disease can be controlled by spraying the plants with zineb 0.3% or Bordeaux mixture 1%.
Regds