Disease forecasting based on symptoms
Ber White mealy growth on leaves and fruits.
Disease/pest: Powdery mildew
Casual organism: Oidium erysiphoides f.sp. zizyphi
Visual symptoms:
Symptoms:
White mealy growth on leaves and fruits. The disease causes premature defoliation and heavy fruit-drop. Affected fruits remain small and become cankered and disfigured. Remedy:
Formation of small irregular’ brown spot on the upper surface of the leaves.
Disease/pest: Alternaria leaf spot
Casual organism: Alternaria chartarum Isariopsis
Visual symptoms:
Symptoms:
The disease is characterised by the formation of small irregular' brown spot on the upper surface of the leaves. On the lower surface dark brown to black spots are formed. Remedy:
Light russet vinaceous coloured, irregular spot on the fruits.
Disease/pest:Soft rot
Casual organism: Phomopsis natsume
Visual symptoms:
Symptoms:
The disease appears as a light russet vinaceous coloured, irregular spot on the fruits. It increases in size and make the whole fruit into pulpy, brown to black in colour with soft and loose outer skin. Remedy:
Fruits become deformed, turn brown and rot.
Period of activity: June to September
Disease/pest: Fruit borer
Casual organism: Meridarchis scyrodes
Visual symptoms:
Symptoms:
Eggs are laid on fruits at pea stage. on hatching caterpillars bore into fruits and feed on the pulp near seed. Period of activity: October to February Remedy:
Small holes on the fruits.
Disease/pest: Fruit borer
Casual organism: Meridarchis scyrodes
Visual symptoms:
Symptoms:
Eggs are laid on fruits at pea stage. on hatching caterpillars bore into fruits and feed on the pulp near seed. Period of activity: October to February Remedy:
Folded leaves and stunted growth on growing point.
Period of activity: August to September
Disease/pest: Leaf-eating caterpillars
Casual organism: Euprocitis fraterna
Visual symptoms:
Symptoms:
The newly hatched caterpillar attacks unopened and partially opened leaves and leaf folding with silken threads. The larvae consumes green matter by scrapping, leaving behind the papery epidermis. In severe state, the tree gives unhealthy appearance and stunted growth on growing point. Period of activity: August to September Remedy:
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Cumin |