摘要
车前草白粉病 (Erysiphecichoracearum)是车前草上一种重要病害 ,主要为害叶片和穗部。病菌以菌丝体和闭囊壳在车前草的病苗上越冬。次年春季在菌丝体上产生分孢子和闭囊壳中释放子囊孢子侵染车前草 ,引起发病。南昌地区车前草叶片于 4月中旬开始发病 ,5月中旬达到发病高峰 ;穗部于 5月上旬开始发病 ,6月上旬达到发病高峰。温度 2 0～ 2 5℃ ,晴天或多云 ,并有短时小雨 ,有利此病发生发展。温度高于 2 8℃ ,雨日多、雨量大、会抑制其扩展蔓延。氮肥施用过量 ,发病重。田间药效试验结果表明 ;2 5 %敌力脱EC防治效果最佳 ,达 89.9% ;其次 6 0 %防霉宝WP防效 74 .3%。
Plantain powdery mildew (Erysiphe cichoracearum) is an important disease in plantain.The pathogen survives the winter period in the from of mycelia and cleistothecia in plantain seedlings. In the following spring, condia which develop from the mycelia and ascospores which are released from the cleistothecia spread and cause new infection.It is harmful to plantain's leaves and fringes.The leaves get it in middle April and its peak occurs in middle May, but the fringes get it in early May and its peak is in early June. The disease develops quickly on sunny, cloudy or occasional slight rainy day with the temperature of 20～25℃, but it will be controlled on heavy rainy day with the temperature above 28℃.Overusing nitrogenous fertilizer will lead to a heavy disease.The experiment indicated that 25% tilt's curative effect was 89.9%,which was the most effective, 60% Fang Mei Bao with curative effect of 74.3% was the second.
出处
《江西农业大学学报》
CAS
CSCD
2002年第6期783-785,共3页
Acta Agriculturae Universitatis Jiangxiensis
关键词
车前草
白粉病
发生规律
防治
plantain
powdery mildew
occurrence law
control
