Effect of 5 fungicides on the control effect of anthracnose in kenaf and the yield of kenaf
To screen out effective fungicides for controlling kenaf anthracnose,Indoor toxicity determination of five fungicides against mycelial growth and spore germination of kenaf anthracnose disease were determined by growth rate method and concave slide method.The control effect of three better fungicides was investigated in field.The indoor test results showed that prochloraz,pyrazoxystrobin,and feniconazole had better inhibitory effects on the mycelial growth and spore germination of kenaf anthracnose.Their EC50 for inhibiting mycelial growth were 0.088 0,0.120 5 and 0.513 6μg·mL-1,and their EC50 for inhibiting spore germination were 0.123 0,0.165 8 and 0.898 7 μg·mL-1.The field control effect of 900 mL·hm-2 of 25％prochloraz emulsion(water consumption is 450 kg·hm-2)sprayed on the leaves of kenaf against anthracnose disease reached 94.34％,and the fiber weight per plant of kenaf increased by 15.92％,with a significant difference.This result provided a reference for the prevention and control of kenaf anthracnose.
kenafanthracnosefungicidetoxicity measurementfield control
国家科技期刊平台
NSTL
万方数据
