摘要
上海郊区大白菜霜霉病有二个明显的发病高峰,即10月上旬末至中旬初及11月初。时为大白菜包心初期至中期。此时日平均温度>10℃,<20℃,有利于孢子囊的产生和萌发。在种子的消毒、复合肥料作基肥和局部推行大白菜直播等栽培技术的基础上,配合应用生物农药抗生素120和化学农药甲霜灵,在霜霉病第一发病高峰前后用药2—3次的综合防治技术,可基本控制霜霉病的危害。1989年在上海大白菜生产基地崇明县示范,推广3000亩,比原习惯防治法降低农药成本26.9%,减少化学农药使用量50%—67%,从而减轻环境污染,增加产量10.4%—18.2%,新增产值25.5万元。
There are two infection peaks of Peronospora parasitica on Chinese cabb- age in Shanghai region(the first ten-day of October and early November).During this period the temperature is below20℃ and over 10℃.This is advantageous to formation and germination of pathogen sporangia.The cultural measures such as seed treatment, direct seeding,application of compound ferlitizer as basic manure,could help stimulate growth of plants,increase their resistance,decrease infection of P.parasitica.We have adopted the integrated management including seeds treatment,direct seeding,applica- tion of compound fertilizer as basic manure and spray of fungicides 2-3 times at the first peak stage of infection.This management could decrease disease incidence, reduce production cost,increase yield of Chinese cabbage by 10—18% in the tested fields of 200 ha in 1989.
出处
《上海农业学报》
CSCD
1991年第4期74-78,共5页
Acta Agriculturae Shanghai
关键词
大白菜
霜霉病
防治
发生规律
Chinese cabbage
Peronospora parasitica
Integrated management