- Attacks both the leaves and the fruit, which are sensitive from
flowering to the midgrowth stage.
- Most of the rot found in mature fruit comes from the infection of young fruit.
- The small spots develop into large, brown spots indicative of fruit rot.
- Finally, a white mycelium appears on the fruit during storage
- Fruit rot of litchi has been a serious problem. Litchi is host to a range of post-harvest pathogens, often with quite different modes of infection.
- Several fungi have been found to be associated with diseases
- Usually large water soaked lesions appear on the surface of fruits.
- Initially the disease symptoms are perceptible on injured portion of the fruits.
- With the advance of the disease the decayed areas get depressed.
- The rot gradually penetrates deep into the pulp.
- Ultimately rind of infected fruits cracks off exposing the pulp which subsequently is covered with thick Cottony mycelium.
- Such affected fruits emit an odour of fermentation.
- A slow decline and a sudden death of plant have been recorded in litchi. It can affect the whole tree or just one or two branches.
- The symptoms include a sudden branch wilt that is followed by the decline of new growth on the affected branch over a period. In other situations, the tips die without wilting.
- The tree or branch may recover temporarily, but subsequently dies. Parts of the tree flush and grow, while other sections die.
- In some parts of litchi belt, trees are killed by the root rot.
- One side of the tree’s crown may be perfectly sound and the other totally necrosis.
- Leaf shed never occurs (it does in the case of a nematode attack) and the internal parts of the roots are characteristically red in colour
- No method has been found to save the tree once it has become infected.
IPM for Litchi
To know the IPM practices for Litchi, click here.
Source: NIPHM, Directorate of Plant Protection, Quarantine & Storage
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