NATALITY STUDY OF FEMALE COCOA POD BORER RELATED TO CLIMATE CHANGES
Authors: Meriam M.Y.
Journal Issue: Malaysian Cocoa Journal, Volume 13(1)/2021
Keywords: Cocoa pod borer, egg, fecundity, mortality, climate change.
Published On: 1/11/2021
Abstract
This study was carried out in two different times. The first study was carried in year 1993 at Quoin Hill Research Station Tawau. The second times of study was carried out in year 2017 at Cocoa Research and Development Centre, Tawau. The experiment was repeated using similar method with the previous study. Three (3) studies were carried out on egg stage of Cocoa Pod Borer (CPB). Study were carried out on fecundity of CPB on actual and potential egg of the female CPB, egg laying pattern of the CPB and egg mortality of the CPB. The result was compiled to compare either the egg laying activities of Cocoa Pod Borer (CPB) change in 24 years times. This study was carried out to compare the natality, fecundity, fertility and mortality of the CPB egg within 24 years times. Results from this study showed that the climate change may give an impact on fecundity of CPB on actual and potential egg in 24 years times. It is shown that the total number of egg laid by female CPB was reduced tremendously. Climate change within 24 years times also affected on egg laying pattern by female CPB. It caused that the female CPB reduce the capability to laid egg in longer period. It showed that the female CPB are less productive to laid egg in longer period. It is shown that the changes in temperature might change the capability of female CPB in duration of egg laying process. Study on CPB egg mortality showed that climate change has not affected the egg mortality factor during the last 24 years.