The infestation of tomato seed by <em>Fusarium oxysporum</em> f.sp. <em>radicis-lycopersici</em>.

Menzies, J. G.; Jarivs, W. R.

The infestation of seed by Fusarium oxysporum f.sp. radicis-lycopersici occurred at rates of 0-1 to 0-01 % in fruit on stem-infected plants. Direct infection of fruit in the flower or young developing fruit stage resulted in a greyish-brown lesion on the stylar end of the fruit or mununification. F. oxysporum f.sp. radicis-lycopersici was isolated from all seeds in such fruit. Picked fruit inoculated on the stem scar also became infected but 96 h after inoculation of the fruit, the seed was not infested or infected. The contact of clean seed with hands that had previously handled F. oxysporum f.sp. radicis-lycoperisid-infested sawdust resulted in a high level of seed infestation. The fungus survived on seed sent across Canada and stored for up to 12 weeks. Treatment with NaOCI or 0.1 N HCl did not completely disinfest infested seed.

CANADA; SEED pathology; TOMATO breeding; FUSARIUM oxysporum; FRUIT development; DISINFECTION & disinfectants

Plant Pathology, 1994, Vol 43, Issue 2, p378

0032-0862

Academic Journal

10.1111/j.1365-3059.1994.tb02699.x