The effect of different combinations of biological fertilizer and different doses of chemical fertilizer on the severity of late blight on potato plants

Abstract Late blight disease is one of the problems faced by potato farmers. Chemical fertilizer and biological (bio-fertilizer) reported have a potential to control late disease. However, there lack research on effect combining use different types bio-fertilizers with doses chemical fertilizers in plants This study aims analyze plants. was conducted from June August Sembalun District, West Nusa Tenggara Province. used fifteen combination treatments fertilizers. Each these included: A (control); B, C, D, E (bio-fertilizers, without fertilizers); Treatment F, G, H, I 100%); J, K, L, M 50%); N (without bio-fertilizer, 100% fertilizer) O 50%). The results showed that no significant difference severity.