Horticultural crops :: Plantation :: Cocoa
Black Pod rot: Phytophthora palmivora, P. megakarya, P. citrophthora and P. capsici
Symptoms
- Infection appears as chocolate brown spot, which spreads rapidly and soon occupies the entire surface of the pod.
- As the disease advances, a whitish growth of fungus consisting of fungal sporangia is produced over the affected pod surface. Ultimately, the affected pods turn brown to black.
- The internal tissues as well as the beans become discolored as a result of infection.
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Chocolate brown spots |
Fully covered brown spots |
Infected seeds |
Management
- Periodically remove the infected pods.
- Spray 1 per cent Bordeaux mixture with on set of monsoon and also frequent intervals.
- Provide frequent drainage and regulate shade to increases aeration.
- Pseudomonas fluorescens (Pf1) liquid formulations @ 0.5% as soil and foliar spray (3 times per year- June, October & February) was found to be effective in reducing the Cocoa Pod rot and Stem canker.
Image Source:
http://hawaiiplantdisease.net/Miscellaneous-diseases.php
http://s3.amazonaws.com/plantvillage/images/pics/000/001/729/large/CIMG1524.JPG?1380810258 |
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