THE PERFORMANCE OF PREDATORY INSECT, Sycanus dichotomus STAL. (HEMIPTERA: REDUVIIDAE) ON COMBINATION OF PLANT HOST AND PREY

Syari Jamian, Nur Azura Adam

Abstract


Metisa plana Walker (Lepidoptera: Psychidae) is one of the most destructive leaf-eating pests of oil palms and the damage are causing significant loss to the oil palm industry. A study was conducted on the control of the bagworm, M. plana, using the predatory insect, Sycanus dichotomus as biological control agent in Integrated Pest Management (IPM) programs of oil palm crops. A study of longevity, number of eggs and hatchability of predatory insect S. dichotomus were recorded. There were three types of combination (treatment) involved in the experiment; Treatment A: 10 months old oil palm, S. dichotomus, Turnera subulata and M. plana as a prey; Treatment B: 10 months old oil palm, S. dichotomus and T. subulata and Treatment C: 10 months old oil palm, S. dichotomus and M. plana as a prey. Different food sources showed different combination of suitability: Treatment A and B significant differences (p < 0.05) of the mean longevity compared to treatment C. Moreover, treatment A, showed a highly significant differences (p < 0.05) on numbers of eggs, duration of the incubation period and numbers of eggs hatching compared to treatment B and C. There was no significant difference between the life span of S. dichotomus male and female on treatment A (30.40 and 30.84 days) as compared to male and female on treatment B (31.08 and 31.72 days), respectively. The cultivation of the suggested beneficial plant in oil palm to maintain the abundance of natural enemies to control pests of oil palm leaves is of major issue. It is recommended that future research is necessary to assess the quality of the environment and habitat to give a more positive effect to predatory insect development.


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