有機栽培で使用できる数種殺菌剤のサヤエンドウのうどんこ病に対する防除効果と残効期間

抄録

Five fungicides available in organic cropping were evaluated against pea powdery mildew in terms of their control effectiveness and duration of effectiveness in the field in the period of 2008-2010. Sulfur flowable（SF）was the most highly effective with protective values of 99-100 for leaf, pod, and stem lesions. Sodium carbonate･copper wettable powder（SCC）and decanoyl-octanyl-glyceride emulsifiable concentrate（DG）were also highly effective with protective values of 94-100 for leaf and pod lesions, and 72-96 for stem lesions. Sodium carbonate water-soluble powder（SC）and Bacillus subtillis wettable powder :Impression（BSI）were also highly effective with protective values of 89-99 and 82-92 for leaf and pod lesions, while 49-68 and 42-73 for stem lesions, respectively. SF, SCC and DG remained effective 2 weeks,SC 1-2 weeks and BSI 1 week, after application. The leaves and pods sprayed with DG appeared glossy ;however, there are no practical problems associated with the glossiness in pea cultivation.