除草剤の土壌病害発生におよぼす影響

概要

論文の詳細を見る
The effects of herbicides on the growth of soi-lborne plant pathogens and on the occurrence of damping-off of cucumber seedlings inoculated with the causal fungi were studied. Among ten sorts of herbicides used, dinoseb, pentachlorophenol, linuron, and chloro-propham inhibited the mycelial growth of Fusarium oxysporum, Rhizoctonia solani and Pythiulm aphanidermatum on culture medium, while 2, 4-D, MCPA, prometryne, and simazine seemed to promote the development of aerial hyphae of R. solani or P. aPhani-dermatum. The effect of antifungal herbicides among above-described on the occurrence of pre- or post-emergence damping-off in cucumber was examined. Pythium+dinoseb, Pythium+linuron, and Fusarium+dinoseb combinations resulted in the increase in healthy seedlings compared with Pythium or Fusarium alone. This is probably due to the anti-fungal effect of herbicides. Rhizoctonia+dinoseb, Rhizoctonia+linuron, Pythiulm+penta-chlorophenol, and Rhizoctonia+pentachlorophenol combinations, however, resulted in an appreciable reduction in cucumber stand due to damping-off compared with Rhizoctonia or Pythium alone. At present, it is not clear whether the herbicid esacted on the pathogens or on the host. It is possible that the herbicides affected the physiology of host plant, so that the susceptibility of emerging seedlings to the pathogens increased. The results may suggest the importance of secondary effects of herbicide.(Receivid Apri 13, 1970)
日本植物病理学会の論文
1970-09-30

除草剤の土壌病害発生におよぼす影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク