PERSENTASE SERANGAN HAMA Brontispa longissima (Gestro) PADA TANAMAN KELAPA (Cocos nucifera L.) VARIETAS GENJAH RAJA DAN VARIETAS DALAM BIDO DI BALAI PENELITIAN TANAMAN PALMA MAPANGET

Abstract

ABSTRACT

This study aims to determine the percentage of pest attack Brontispa longissima (Gestro) on
coconut (Cocos nucifera L.) varieties Genjah Raja and varieties Dalam Bido. The results of the study
are expected to provide information or knowledge to the public regarding the percentage of pests
Attacks B. longissima on coconut so that B. longissima pests can be controlled. The research was
carried out in the coconut plantation area of the Palma Research Institute (Balit Palma) Mapanget
District, North Minahasa Regency. The research took place from March to July 2021. The research
was conducted in the form of a survey or by direct observation at the research site. The study was
conducted at the Experimental Garden of Mapanget on coconuts of Genjah Raja and Dalam Bido
varieties with a land area of ± 0,2 hectares for each variety, then divided into five sub-plots of
observations spread diagonally. The things that were observed in this study included the symptoms of
the attack, the plants that were attacked, the fronds that were attacked and the category of attack.
The results showed that the percentage of B. longissima pest attack on coconuts in the Dalam Bido
variety was 20% and the Genjah Raja variety was 12.5%. The percentage of midrib that was attacked
by B. longissima in the Dalam Bido variety was 17.99% and the Genjah Raja variety was 10.91%.
Keyword : Percentage, B. longissima, Coconut