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薇菜白粉病是近年在鄂西地区发现的一种新病害 .调查表明 ,该病害每年有两次发病高峰 ,分别在5月上、中旬和 7月中、下旬 ,其发生程度与光照、经营水平等因素有关 .光照、温度适宜 ,经营水平高 ,薇菜生长势和抗病力强 ,病害发生轻 .经药剂筛选和防治试验 ,提出了综合防治技术措施 :加强经营管理 ,冬季清园并施 3- 5 Be石硫合剂消灭越冬病原 ;初春展叶后施 1%等量式波尔多液 ;病害发生期 ,交替施用0 .3- 0 .5 Be石硫合剂 ,15 %粉锈宁WP和扑菌特WP15 0 0倍液 ,间隔期 7- 10d ,可取得良好的防治效果 .
Osbeck powdery mildew is a new disease found in Western Hubei Province in recent years.The survey showed that the disease peaked twice a year, respectively, in May, mid and July in mid and late, the extent and the light of its operation Level and other factors.Under the conditions of light, temperature and high operating level, the growth vigor and disease resistance of Osmunda chinensis is strong and the disease is mild.After the screening of medicaments and the experiment of prevention and control, we put forward the technical measures of comprehensive prevention and cure: strengthening management and operation, Application of 3- 5 Be lime sulfur agent to eliminate the overwintering pathogen; early spring after the application of 1% of the same amount of Bordeaux mixture; disease occurs, alternating application of 0.3 - 0.5 Be limestone sulfur, WP WP and 15% Special WP15 0 0 times, interval 7 - 10d, can achieve good control effect.