PENGUJIAN BEBERAPA PESTISIDA NABATI UNTUK PENGENDALIAN SERANGAN HAMA ULAT API PADA DAUN TANAMAN KELAPA SAWIT (ELAEIS GUINEENSIS JACQ.) DI DESA TOMUAN HOLBUNG KECAMATAN BANDAR PASIR MANDOGE

Abstract

The decline in the production of oil palm yields in Tomuan Holbung Village,
Bandar Pasir Mandoge Subdistrict, Asahan District was identified as a result of a very high
level of pest infestation. Pests that are often found and becomes the problems are Setothosea
asigna larva. Controlling these pests is a relatively high cost through the application of
chemical synthetic pesticides. The purpose of this research to determine the best formulation
of botanical pesticides and their influence in reducing Setothosea asigna larva pests.
Botanical pesticides which will be tested in this research are based from garlic, lemongrass
leaves, pepper seeds, turmeric, tobacco leaves and papaya leaves. Formulations from each
source of vegetable material were put into the leaves of palm plants and then tested on
Setothosea asigna larva. The parameter observed in this study was the level of palatability of
Setothosea asigna larva. The observations made were based on the level of decrease in the
percentage of feeding activity, the weight of feed (palm oil plant leaves) that were consumed
by the Setothosea asigna larva in the period 1-6 days after application. The results of the
study showed that all treatments of botanical pesticides consisting of: 1) garlic, 2) lemon
grass leaves, 3) pepper seeds, 4) turmeric tubers, and 5) tobacco leaves were significantly
different from without treatment or control. Then the results of the study also showed that the
application of botanical pesticides affected the palatability of the Setothosea asigna larva,
which accelerated death, appetite and decreased eating activities. The best treatment of
vegetable pesticides from tobacco leaves in controlling the Setothosea asigna larva's
palatability. Setothosea asigna larva die on first day, It don’t want to eat after the application
of botanical pesticides, and the level of eating activity decreases to 100%.
Keywords : Setothosea asigna larva, botanical pesticide, palm plants