VIEW ARTICLE

Isolation of AM-Toxin I, A New Phytotoxic Metabolite from Alternaria mali. T. Ueno, Research Associate, Pesticide Research Institute, Kyoto University, Kitashirakawa Sakyo-ku Kyoto Japan; Y. Hayashi(2), T. Nakashima(3), H. Fukami(4), S. Nishimura(5), K. Kohmoto(6), and A. Sekiguchi(7). (2)(3)(4)Graduate Student, Graduate Student, and Professor respectively, Pesticide Research Institute, Kyoto University, Kitashirakawa Sakyo-ku Kyoto Japan; (5)(6)Professor and Associate Professor respectively, Department of Agriculture, Tottori University, Koyama Tottori Japan; and (7)Associate Plant Pathologist, Nagano Horticultural Experimental Station, Susaka Nagano, Japan. Phytopathology 65:82-83. DOI: 10.1094/Phyto-65-82.

A host-specific toxin (AM-toxin I, C₂₃H₃₁N₃O₆) has been isolated from culture filtrates of Alternaria mali, the causal agent of blotch of apple. This compound produces veinal necrosis on susceptible leaves of apple in very low concentrations, and has the same host specificity in phytotoxic action as the causal fungus.