Tarihoran, P., Siregar, A.Z. and Marheni 2020. Diversity Index of Insect Species on Sorghum Plantations in Kolam Village, Percut Sei Tuan District, Deli Serdang. Indonesian Journal of Agricultural Research. 3, 2 (Jul. 2020), 89 - 104. DOI:https://doi.org/10.32734/injar.v3i2.3865.