摘要
油菜菌核病是油菜上三大病害之一，近年来发生严重，轻者造成油菜减产２０％～３０％，重者高达５０％以上，严重影响油菜产量和菜籽的含油量。对油菜菌核病的发生规律及防治技术的研究，国内已有报道［１，２，３］，而对其防治适期研究尚少，且防治适期描述比较模糊。为...
Relation between percentage of flowering plants and optimum period for chemical control of S.sclerotiorum was determined in the field of “Qingyou 2”. When percentage of flowering plant was 100%, the percentage of petal with S.sclerotiorum was the highest. The optimum period for chemical control of S.Sclerotiorum was from percentage of flowering stems being 100% to percentage of flowering branches being 80%. 5～7 days after the first spray of pharmaceutical product, i.e. percentage of flowering branches being 100%, the sceond spray should be done. Thus, rape yield loss made by S.sclerotiorum could be reduced to the lowest.
出处
《江苏农业学报》
CSCD
北大核心
1998年第4期249-251,共3页
Jiangsu Journal of Agricultural Sciences
基金
江苏省"九五"攻关课题
关键词
油菜
开花株率
菌核病
化学防治
rape
percentage of flowering plant
Sclerotinia sclerotiorum
chemical control
