Feature: Got Wilt? How to Recognize 3 Kinds of Tomato Wilt Diseases
Image: Tomato Dirt
Mid-season is a time when tomato gardeners start to notice nasty diseases creeping into the tomato patch. One tomato disease category in particular – tomato wilts – share several symptoms, though the fungi culprits are different. Look for these ways to tell tomato wilts apart.
Fusarium wilt. Look for yellowing and wilting on one side of the plant – a leaf, single shoot, branch, or several branches. Yellowing and wilting move
up the plant as the fungus spreads. Wilted leaves dry and drop prematurely
Verticillium wilt. Yellow spots appear on lower leaves, followed by brown veins. Leaves then turn brown and fall off. Infection pattern often resembles a V-shape. Symptoms progress up the stem.
In all three cases, the interior of main stem (when split) is dark, water-soaked, or streaked – the result of plugged water-conducting tissue.
Walnut wilt is a disorder caused by the uptake of the chemical juglone, present in walnut trees, which is toxic to tomatoes. Symptoms closely resemble those of fusarium wilt and verticillium wilt, including yellowing and browning leaves, leaf drop, and stunted growth. In addition, stems turn brown or streak.
With exposure to juglone, tomatoes growing next to a walnut tree abruptly wilt and die. Tomato plants growing a short distance away
may not die, but become flaccid and stunted.
Learn more details about walnut wilt so you can identify it and prevent it in your tomato patch.
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