EFFECT OF BAGWORM Pteroma pendula Joannis ATTACK ON THE DECREASE IN OIL PALM PRODUCTIVITY

Abstract

Outbreak of oil palm bagwormPteroma pendula has been reported within the last few years in several plantations in North Sumatra. A study was conductedto determine the impact of P. pendula attacks on oil palm productivity. Aerial photograph was taken in November 2016 andanalyzed to determine the level of damage on each palm canopy. The damage symptoms were classified onto healthy palms ascontrol plants (score 0), mild (score 1), moderate (score 2), severe (score 3), and very severe (score 4). The sample palms wererandomly selected and observed for the sex ratio, bunch number and bunch weight at 18 months after defoliation. The attackof P. pendula at the highest level (score 4) caused a significant effect on sex ratio and the number of bunches produced. Thefresh fruit bunches production was declined 21.02–36.35% on palms with moderate to very severe attack (score 2–4). Similarpalms also have a potential case of inflorescences abortion 18.41–32.54%. However, the average bunch weight was notinfluenced by P. pendula attack.

Serangga Predator Dan Parasitoid Pada Daerah Endemik Serangan Ulat Api Pada Perkebunan Kelapa Sawit Rakyat

“…Hama dapat menyerang kelapa sawit pada fase pembibitan sampai budidaya di lapangan. Sebagian besar hama yang menyerang kelapa sawit berasal dari kelompok serangga terutama dari ordo Acrididae)] (Febriani et al, 2020;Priwiratama et al, 2019;Kamarudin & Wahid, 2010). Serangga hama tersebut menyerang hampir semua bagian tanaman kelapa sawit mulai dari akar, batang, tandan buah, dan daun.…”

Field evaluation of Bacillus thuringiensis product to control Metisa plana bagworm in oil palm plantation

“…In general, minor damage to the fronds of 10-13% led to a decrease in production of 33-40% [1]. Priwiratama et al reported that Pteroma pendula bagworm attacks were able to reduce production by 36.35% [2]. Meanwhile, Metisa plana caterpillar attacks in Malaysia caused yield losses of up to 43% [3].…”

The efficacy of single and double tank thermal fogging tool of Bacillus thuringiensis application in oil palm

“…The common control methods of these bagworms were limited by using synthetic chemical insecticides. The use of synthetic chemical insecticides is preferred because it is faster to control pest populations and easy to use [4]. However, the use of synthetic Insecticides continuously is very unwise and could cause various negative impacts on the environment.…”