TINGKAT SERANGAN ULAT KANTONG Metisa plana Walker (Lepidoptera: Psychidae) TERHADAP UMUR TANAMAN KELAPA SAWIT (Elaeis guineensis Jacq.) DI KEBUN MATAPAO PT. SOCFIN INDONESIA

Abstract

The attack rate of bagworms Metisa plana Walker (Lepidoptera: Psychidae) on the age of oil palm (Elaeis guineensis Jacq.) at Matapao Plantation, PT Socfin Indonesia. Under the supervision of Mena Uly Tarigan as the chairperson and Lisnawita as the member. The aim of the research was to know the attack rate of bagworms (Metisa plana Walker) on the age of oil palm at the planting area of TBM (pre-producing plant) and TM (post-producing plant). The research was conducted at Matapao Plantation, PT Socfin Indonesia, Teluk Mengkudu Subistrict, Serdang Bedagai District with the altitude of ± 20 meters from the sea level. The research used a survey method with diagonal samples. The results of the research showed that the attack rate of bagworms was higher on the TBM than on TM. The highest number of pests was found at block 27 in the planting year of 2011 with 119 pests, while the highest rate of attack by bagworms (19.758%) was found at block 28 in the planting year of 2009. The highest attack of bagworms was found in sample 50 at block 27 in the planting year of 2011 with 15 pests in each frond. The highest intensity of bagworms’ attack (50%) was in sample 50 at block 27 in the planting year of 201, and it was categorized as a moderate attack. Keywords: bagworms Metisa plana, oil palm, the age of oil palm