摘要
两年人工接种试验表明,大豆在始荚期和盛荚期受灰斑病菌侵染为害所出现的病粒率最高,分别占各阶段接种病粒总和的29.4％和32.0％;百粒重分别比对照降低5.8％和13.4％。田间试验一次施药的关键时期也是始荚期和盛荚期,单位面积产量分别增加11.1％和8.6％。从而确定了经济有效的施药时期是始荚期至盛荚期。
According to the results of experiments of artificial inoculaions in two years, the highest rate of diseased seeds were obtained at the beginning of pod formation (R3) and pod filling (R4) by the infection of the pathogen. The rate of diseased seeds at these two periods were 29.4% and 32.0% respectively. 100 seed weight was 5.8% to 13.4% lower than those of the control. The results of field control experiments showed that the key periods of fungicide spraying were at the beginning of pod formation and pod filling. Soybean yields in average per mu were increased around 8.6-11.1% by application of fungicide at the two stages.
出处
《大豆科学》
CAS
CSCD
北大核心
1991年第2期135-138,共4页
Soybean Science
