摘要
SMV田间侵染率是由田间迁飞着落的得毒蚜量决定的,是田间病株率和迁飞着落蚜量二者一定数量关系的组合。SMV流行程度取决于病害发生期田间侵染率的大小。所以应从降低初侵染水平并以一定的田间侵染率为指标推迟介体蚜虫盛发期控制SMV流行。田间SMV日侵染率超过1％病害便进入流行盛期。通过单位绿色诱盘捕获翅蚜量和当时的田间病株率实现了SMV田间日侵染率的预测。
ELISA method was used to detect seed-born rate of SMV to sowing the plots which have different primary infection sources. The trap plants indexing daily infection rate and the green-pantraps monitoring alate aphids landing on soybeans were used to study SMV epidemiology. The results indicated the infection rate of SMV was determined by the number of virus acquisition aphids alighting on soybeans. The infection rate resulted from coordination between disease incidence and the number of aphids taking off and landing on soybeans in the plots. The infection rate determined whether SMV epidemic development was severe or not. Controlling SMV epidemics should, based on the infection rate being high or low, reduce SMV primary infection sources and delay high peak period of vector aphids. When the daily infection rate of SMV was over 1％, the disease incidence increased rapidly. The prediction model of the daily infection rate of SMV was built with no. of alate aphids of the green-pantrap and disease incidence in the fields
关键词
大豆花叶病毒
SMV
侵染率
SMV epidemiology Infection rate Green-pantrap Prediction of daily infection rate
