Tirathaba rufivena (LEPIDOPTERA: PYRALIDAE) LARVAL POPULATION IN DİFFERENT FEMALE OIL PALM INFLORESCENCE PHENOLOGY

Muhammad Idrus S., Abu Hassan A., Abdul Hafiz A.M., Aiman Hanis J., Ting Chuan S., Cik Mohd Rizuan Z.A.

Abstract


Oil palm inflorescences are important diet for a certain pest known as the fruit bunch moth, Tirathaba rufivena. Currently, there was no study that stated which bunch or inflorescence stage that is preferred by T. rufivena. Therefore, the purpose of this study is to determine which oil palm bunch phenology had the highest T. rufivena population. Bunch from selected categories of oil palm bunch stage, T. rufivena frass condition and infestation level were counted, marked and harvested. Harvested bunch then were cut opened to collect and count the larvae. The results show that the young bunch with new frass and high infestation had the highest count of T. rufivena larvae (75.33 ± 12.98). Large numbers of T. rufivena larvae from all sizes were found in the young bunch with new frass and high infestation indicated an overlapping generation of T. rufivena within the same bunch. Collectively, these findings indicate that young bunch highly preferred by T. rufivena and any effective controlling need to initiate as early as at post anthesis of female inflorences stage. 


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References


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