การใช้สารสกัดจากพืชในการควบคุมโรคไหม้ของข้าว

Abstract

Effectiveness of crude extracts from Eupatorium spp. and Curcuma spp. as an alternate method to chemical control were studied. These kinds of plant extract were tested in the laboratory for their potential to inhibit the mycelial growth of rice blast disease fungus and showed 100 percent inhibition. The field experiment was conducted in farmer's field in amphur Muang, Khonkaen during wet season 2005. The experiment was designed as RCB (randomized complete block design) with 4 replications and 4 treatments. The treatments were 1) foliar-sprayed with crude extract from Eupatorium spp., 2) foliar-sprayed with crude extract from Curcuma spp., 3) foliar-sprayed with fungicide Tricyclazole and 4) foliar-sprayed with water as a check. KDML 105 rice variety were sprayed at tillering and seedling stages at rate of 40 L/rai (250 L/ha). The result of experiment indicated that crude extracts from Eupatorium spp. and Curcuma spp. could not control rice blast disease progress.