Erika Wahyu Hasibuan, Ameilia Zuliyanti Siregar, Mukhtar Iskandar Pinem
This research was conducted in the Coconut Plantation in Kelurahan Besar, Medan Labuhan District, North of Sumatra from June to July 2019 using diagonal methods (size sampler is 23 x 23 m) of 5 plots, each plots using 3 traps (sweep net, yellow sticky trap, fit fall trap) for 5 x observations at 2 day intervals. The results showed consist of 9 insects were identified in the coconut plantations, 33 families, 43 genera with a total of 786 individuals. The most caught insect families are from the Family Chironomidae as much as 357 individuals, followed by the Ceratopogonidae family of 116 individuals, and family Ectobidae are 102 individuals. Score of Absolute Density (AD), Relative Density (RD) are performed with fluctuating values. Based on insect status, there were 20 species is categorized into pests (720 individuals); predators (19 species, 59 individuals); parasitoids (4 species; 6 individuals) and 1 as pollinators is Lucilia sp. When the Type of Richness Index value is calculated as R = 8.42; Evenness Index (E = 0.55), and Insect diversity index (H '= 2.07), which can be categorized as moderate, meaning that insect diversity is still commonly found in coconut palms. This criterion shows the diversity of pests and natural enemies which mutually increase in number of populations towards balance, where environmental conditions are not yet disturbed.
Diversity; Insects; Coconut plants; Medan Labuhan; North Sumatra.