Wilting of leaves and branches are a first symptom of this fungal disease, which can infect many kinds of vegetable garden plants, including tomatoes, peppers, melons, cucumbers and potatoes. The fungi clog the plant’s vascular system (where water and nutrients flow from roots to shoots), starting in the roots and moving up through the plant.
Verticillium can be identified by examining a cross section of a stem taken from near the base of the plant. If the plant is infected, the stem interior is likely to be brown in color. Stressed plants are more likely to be contract this disease. Herbaceous plants may die in a few weeks; with trees, it may take a few years before they succumb to verticllum wilt. Infection rates are much higher during cool, wet weather. Fusarium wilt causes similar symptoms.
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