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Insects

            

FUSARIUM AND VERTICILLIUM WILT 

FUSARIUM AND VERTICILLIUM WILT
These are similar soilborne fungal diseases that invade plants' vascular systems and restrict their water-carrying capacity. Plants wilt, but watering does not revive them. Fusarium affects many flowers and vegetables. It is most active in warm, dry soil. Verticillium occurs in flowers, vegetables, trees, and fruit crops.

SIGNS Foliage wilts, yellows, and browns, often starting on one side of a plant or one branch. Small plants die. A cross-section of the stem shows discolored, brown or black tissue.

CONTROL Plant resistant varieties; plant early. Solarize the soil before planting. Crop rotation is marginally effective because spores persist in soil for many years. Dig up and remove roots and soil; destroy infected plants immediately. Clean tools and shoes to inhibit spread of spores. Limit movement of irrigation water flowing from infected plants to other plants. Replace soil in raised beds. Control cucumber beetles.