Susceptibility Of Cocoa Pods To Colletotrichum Gloeosporioides Infection
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Date
1989
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Abstract
Cocoa pods of different sizes and ages were inoculated by spraying a conidlal suspension of Colletotrichum gloeosporioides Penz. with and without injury. Although all types of inoculations caused infection of cherelles and young pods, severity of infection depended upon the method of inoculation and age of pods. The cork borer method of inoculation was preferred on account of the highest percentage of infection and uniformity in the development of lesions, which facilitated the measurement of lesions and proper assessment of the disease. For the measurement of lesion size seventh day of inoculation of cherelles is ideal. When pods were inoculated without wounds, infection was initiated mostly from the stalk end indicating that the stalk end was more vulnerable for infection than other parts. The susceptibility of pods decreased with increase in age of pods, the cherelles being more susceptible. Nearly mature pods did not take up infection. There was a significant variation in the lesion size between different age groups.
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J.Plantn.Crops 1989 suppl. v-16 p-255-260