Mode of infections of the sweet-potato wilt Fusarium
1949
McClures, T.T., University of California, Berkeley (USA)
The principal mode of infection of sweet-potato sprouts by Fusarium oxysporum f. batatas was found to be by way of vascular wounds such as freshly cut stems, roots, or fresh leaf scars. Infection did not occur through uninjured stems or roots, root eruption wounds, or the callus of a healed basal wound. Tobacco, the other known suscept of this pathogen, was infected when roots were cut or damaged by transplanting, and remained healthy when inoculated without wounding. Single-spore isolates of the pathogen could be separated in two culturally recognizable groups which are believed to correspond to the two species listed by other authors as causing Fusarium wilt of sweet potatoes and may also correspond to two of the three races listed as causing Fusarium wilt of tobacco.
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