COMPARISON THE EFFECTS OF PARASITISM OF ANISOPTEROMALUS CALANDRAE (HOWARD) AND THEOCOLAX ELEGANS (WESTWOOD) TO BEAN WEEVIL
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Abstract
The mung bean storage problems were infestation and destruction by mung bean insect pests. Especially, the bean weevil, Callosobruchus maculatus (F.), was one of the major pests of mung bean in Thailand. The objective of this research was to compare the effect of parasitism of Anisopteromalus calandrae (Howard) and Theocolax elegans (Westwood) to the bean weevil. The experiments were arranged in a completely randomized design (CRD). The sex ratio of A. calandrae and T. elegans between male and female 5 pairs were leaved into glass vials containing 100 seeds of mung bean with the 4th larval instar of bean weevil in the seeds. The treatments were replicated five times. After leaving for 24 hrs the A. calandrae and T. elegans were removed from the glass vials and was kept at temperature (25-27°C) with Relative Humidity (RH) at (75-80%). The research found that the A. calandrae had the parasitism higher than the T. elegans at the 4th larval instar of bean weevil. The percentage of parasitism and number of progenies of A. calandrae was 78.73% and 54.80 + 3.96 adults respectively, whereas the T. elegans was 57.19% and 33.40 + 3.61 adults, respectively. The sex ratio of male and female of the A. calandrae was 1:1.73 whereas the T. elegans was 1:1.38.
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References
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