PATH 372 Diseases of Horticultural Crops
PATH 372 Diseases of Horticultural Crops
PATH 372 Diseases of Horticultural Crops
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DISEASES OF SAPOTA<br />
1. Phavophleospora leaf spot – Phavophleospora indica<br />
Symptoms<br />
Numerous, small, circular, pinkish to reddish brown, conspicuous spots with<br />
whitish center on mature leaves<br />
Spots coalesce and leaves drop prematurely<br />
Favourable conditions<br />
Severe during Oct-Dec<br />
Fungus grows best at 25 0 C and 90% RH<br />
Susceptible varieties: Cricket ball, Kirthabarthi, Mimusops hexandra (root stock)<br />
Management<br />
Avoid susceptible varieties<br />
Spray zineb@0.2% or ziram@0.2% or COC@0.25%<br />
2. Pestalotiopsis leaf spot – Pestalotiopsis versicolor (Syn: Pestalotia versicolor, P.<br />
sapotae and P. podocarpi)<br />
Symptoms<br />
Small, reddish brown specks on leaf lamina<br />
Spots enlarge, become circular measuring 1 to 3 mm in diameter<br />
Fully developed spots show grayish centre and dark brown to reddish margin<br />
Minute black fruiting bodies (pycnidia) are seen in the center <strong>of</strong> spots<br />
Management<br />
Spray zineb@0.2%<br />
3. Flat limb – Botryodiplodia theobromae<br />
First reported from Maharashtra and Gujarat by Khurana and Singh in 1972<br />
Symptoms<br />
Branches <strong>of</strong> affected trees become flat and twisted<br />
Leaves become thin, small and yellow<br />
Cluster <strong>of</strong> leaves and flowers on affected twigs<br />
Flowers remain infertile<br />
If fruits are set, they are undersized, hard and fail to ripen<br />
Foliage and fruits fall prematurely<br />
Management<br />
Pruning <strong>of</strong> affected branches followed by Captan or Zineb (0.3%) spray<br />
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