新型缓释甲霜灵颗粒剂对大豆根腐病主要致病菌的防治效果研究

为了能够在大豆整个生育期对大豆根腐病进行防治,试验在2014年采用缓释甲霜灵颗粒剂对大豆根腐病主要致病菌:大豆疫霉病菌、大豆镰孢菌进行了室内菌株菌丝生长抑制试验,同时对缓释甲霜灵颗粒剂在田间持效期及防效进行了田间试验。试验表明:缓释甲霜灵颗粒剂在室内抑菌试验中抑制率最好,对疫霉菌的EC_(50)为0.364,对镰孢菌的EC_(50)为0.5800,均为最小;并且田间试验中发现,在5种防治药剂中防效最好,可以有效防治大豆生长后期大豆根腐病的发病情况,是一种防治大豆根部病害的新型药剂,为绿色、高效的大豆综合防治技术奠定了一定的基础。

Control Efficiency of a New Type Controlled-release Metalaxyl Granule on Main Pathogenic Bacteria of Root Rot of Soybean

In order to control soybean root rot in the whole growth period of soybean, indoor mycelial growth inhibition test was conducted using a new type controlled- release metalaxyl granule to control the main pathogens of soybean root rot: Phytophthora sojae and soybean Fusarium in 2014. At the same time, a field experiment of the lasting period and the control effect of the new type controlled-release metalaxyl granule was carried out. The results showed that the inhibition rate of indoor test was the best, the EC50 to P. sojae was 0.364 and the EC50 to Fusarium was 0.5800, which were all the lowest. And the field experiment showed that the controlled-release metalaxyl granule had the best field control effect among the 5 kinds of bactericides. It could prevent the soybean root rot in the late growth stage. The new pesticide was an environmental friendly and high-efficiency agent, which laid a foundation for the prevention and control technology.