云南十字花科蔬菜根肿病发生规律及防治技术研究

十字花科蔬菜根肿病是由鞭毛菌亚门芸苔根肿病菌(Plasmodiophora brassicae)侵染引致的一种土壤传播病害.在云南10个地州市49个县(区)均有发生.全年均可发病,并有夏秋病重,冬春病轻的危害特点.大白菜、甘蓝全生育期均可感病,尤以苗期为烈.二叶期以前是病菌最早的侵入时期.因此,幼苗期是防治重点,培育无病壮苗是防病保苗保产的关键措施.大白菜品种间抗病性差异明显,通过田间筛选,白菜王、星星、俄罗斯大白菜等品种较抗病;百菌清、甲基托布津等是防治根肿病的有效药剂.

Study of Occurrence Regularity and Control Techniques of Clubroot of Crucifers in Yunnan

Clubroot of Crucifers is a kind of soil-brone disease,which is caused by Plasmodiophora brassicae of Mastigomycotina.It is occurred in all the 49 counties and 10 areas of Yunnan province.The character of harmfulness is that clubroot of crucifers is occurred yearly,severely in summer and autumn,slightly in winter and spring.The period of whole growth Chinese cabbage is infectious easily,Especially,In the period of seedling.The time of earliest invasion is pre-twoleaves.In order to guard against the disease,protect the seedling and ensure the yield,The key measure is cultivating healthy and strong seedling.The difference of resistance of disease among the veriety of chinese cabbage is obvious.The king of Chinese cabbage,XingXing,Rusian Cabbage are more resistant through field screening.Chiorothalonil and Thiophanalemethyl are the effective pesticide to control Clubroot of Crocifers.