One of the most common and damaging diseases. Generally not damaging unless soil and air temperatures are high in much of the season. Slight yellowing of a single leaf, or slight wilting of the lower leaves is followed by an overall yellowing. Brown discoloration of vascular tissues in stem or petioles of wilted leaves is common. Choose Fusarium resistant cultivars, grow in clean soil, rotate crops, destroy vines at end of the summer.
Nematode infection increases risk of fusarium infection.
Small whitish rings, 1-3 mm diameter, on green tomatoes. Warmer, drier conditions control. Also on peppers, eggplants, ground cherries, etc. Dark brown spots on underside of leaves in warm, humid weather. Affected leaves turn yellow, wither, drop.