e-ISSN 2231-8542
ISSN 1511-3701

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The Relationship between Population Fluctuations of Helopeltis theivora Waterhouse, Availability of Cocoa Pods and Rainfall Pattern

Rita Muhamad and Chung Gait Fee

Pertanika Journal of Tropical Agricultural Science, Volume 16, Issue 2, August 1993

Keywords: Population fluctuations, Helopeltis theivora, cocoa pods, rainfall

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Investigation on factors affecting the population fluctuations of Helopeltis theivora in relation to food supply and rainfall in the field was conducted. Results showed that population fluctuations seem to be dictated by rainfall and numbers of available pods as shown by positive correlations between them. The results also showed a significant yield decrease with increased mirid populations. The numbers of cherelles and pods on a tree determine its attractiveness, since significantly more cherelles and pods were found on infested trees than on uninfested trees.

ISSN 1511-3701

e-ISSN 2231-8542

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