Hermanto, C., Tarigan, R. and Manik, F. 2019. The Effect of Level Farmers’ Knowledge In Some Active Chemical Insecticides Resistance to Control Plutella Xylostella Scale Laboratory. JERAMI : Indonesian Journal of Crop Science. 2, 1 (Aug. 2019), 50-59. DOI:https://doi.org/10.25077/jijcs.2.1.22-32.2019.