A New Insecticidal Pyrethroid Ester |
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Authors: | Keimei Fujmoto Nobushige Itaya Yoshitoshi Okuno Tadaomi Kadota Takashi Yamaguchi |
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Institution: | Research Department, Pesticides Division, Takarazuka Laboratory, Sumitomo Chem, Co., Ltd., 2–1, 4-chome, Takaisukasa Takarazuka, Hyogo |
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Abstract: | Infected leaves of the noxious weed johnsongrass were collected in a field with a view to the isolation of toxigenic phytopathogens. Exserohilum turcicum (Pass.) Leonard et Suggs ≡ Drechslera turcica (Pass.) Subramanian et Jain] was isolated from leaf lesions and grown in a liquid culture to yield the known fungal metabolite monocerin (1). This compound was shown to possess (non-specific) phytotoxic activity. Monocerin inhibited seedling growth both of johnsongrass and, to a lesser extent, cucumber. The phytotoxic nature of this compound has not been described previously. Its activity against leaf tissue of two other species, from different plant families, was also demonstrated. |
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