Biodiversity of paddy insects in Northern Sumatera

Biodiversity and food security are related to four dimensions: availability, accessibility, utilization and stability. The aim the study to determine the diversity and functional roles of local insects in paddy plantation; and to knowing the interaction of environmental variables and agroecosystem management. The research was done during July-August 2022 in Sei Beraskata Villages, which trap sample point were determined diagonally (20 x 20m) by 3 plots each using 5 traps (Sweep Net=10 swings; Color Pan Trap=4 replications; Core Sampler=4 replications; Yellow Sticky Trap=5 replications; and Light Trap=1 replication) at 4 times sampling with weekly intervals. The results showed the highest individual abundance and diversity were identified from YST traps (479 individuals, 47 species), followed by LT trap (288 individuals, 14 species) and SN trap (236 individuals, 36 species), while the smallest from the CPT traps (66 individuals, 14 species). A total of pests dominated of Chironomus sp, Anopheles sp, Tetragnatha sp, Leptocorisa oratorius, and Chilo supressalis. While the smallest species of Panstenon sp, Euscyrtus concinnus, Temelucha philippinensis. The calculation of the Biological index, R1=2.70-3.25, (E=0.54-0.78), H'=2.02-2.38 and (D=0.60-0.84). Biodiveristy of paddy insects in Northern Sumatera is quite high and reflect to agroecosystem services.