Learn how to spot the symptoms of several tomato diseases, including early blight, late blight and nematodes, and adopt strategies to keep your plants healthy.
Wide spacing between plants and applying thick mulch will help fend off the spread of tomato diseases. Also prune off low branches to reduce the number of early blight spores and improve air circulation around the base of your plants.
Illustration by Lyn Wellsand
Carefully look at leaf symptoms to identify tomato diseases. On these leaves, from left: Bull’s-eye lesions indicate early blight, bronzing suggests tomato spotted wilt, and yellow V-shapes signal verticillium wilt.