Abnormal leaf fall: Phytophthora palmivora& P. nicotianae var. parasitica
Symptoms:
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It occurs during June – August, while general leaf fall occurs during December.
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On leaves dull grey, circular spots appear which enlarge and become irregular.
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The petiole exhibit sunken spot. Affected fruits rot. Leaves shed prematurely either green or after turning coppery red.
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The affected leaf form a thick carpet of rotting foliage which emits bad smell.
Management:
Image source http://www.vietmarubber.info/web/assets/images/runglamuamua.jpg, http://rubberdisease.blogspot.in/ |
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Abnormal leaf fall |
Fruit rot |
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