Introduction Study of Potential of Natural Insecticide Liquid Smoke from Solid Waste Oil Palm to Brown Plant Hopper (Nilaparvata lugens Stall) in South Kalimantan. AJAS [Internet]. 2015 Feb. 13 [cited 2026 Feb. 11];3(1). Available from: https://ajouronline.com/index.php/AJAS/article/view/2510