Publication: Relationship Of Oil Palm Inflorescence And Evaluation Of Several Insecticides On Tirathaba Mundella Walker Lepidoptera Pyralidae And Elaeidobius Kamerunicus Faust Coleoptera Curculionidae
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Date
2017-07
Authors
Shukor, Muhammad Idrus
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Abstract
Oil palm plant, (Elaies guineensis Jacq.) from family Palmae was originated from the West Africa and was brought into Malaysia by British Colony. It is now known as the “golden crop” and have become one of the most important oil producing plants in the world. Oil palm inflorescences and bunches are important diet for two insects, the fruit bunch moth, Tirathaba mundella and the pollinating weevil, Elaeidobius kamerunicus. T. mundella cause 50 % loses of fresh fruit bunch (FFB) while E. kamerunicus is an important pollinator. The objectives of this study are: (1) to find the relationship between the oil palm inflorescences and bunches stage with T. mundella and E. kamerunicus, (2) to find the efficacy and residual effect of several insecticides towards the T. mundella population and (3) to determine the effect of several insecticides towards the E. kamerunicus population. By using Biologische Bundesantalt, Bundessortenamt und Chemische Industrie or BBCH scale, the oil palm inflorescences and bunches stage were described and used for further study on both insects. The results show that the young bunch (E) with new frass (N) and high infestation (H) have the highest count of larvae. Location with high rotten bunches are having high T. mundella infestation and larvae count. Besides, location with high rotten bunches also had low male inflorescence. Both results show that lower pollination which caused T. mundella infestation to increase thus increasing the rotten bunches count. The time taken for male inflorescence to complete their development was approximately 9 days. The study found that pollinating weevil populations were most abundant during peak anthesis time.
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Keywords
Inflorescence And Evaluation Of Several Insecticides , Tirathaba Mundella Walker Lepidoptera Pyralidae