8. Verticilium wilt (Verticilium dahliae) This is mold of the soil that penetrates through roots. It can survive in the soil for long time. Its development is favoured by mild temperatures and can affect plants at all stages of development. Symptoms are often severe at fruit set or during dry periods. Symptoms and damage • Gradual wilting until the death of the plant • Softening and yellowing of old leaves (V-shape) • Dark brown discoloration of the vascular tissue of the stem. • Surface root tissue looks healthy
Internal discoloration of the vascular tissue while surface roots appear healthy
Gradual wilting and yellowing of lower leaves
Management • Use resistant varieties • Crop rotation with non-host crops for 3-4years • Remove diseased plants and weed filed • No curative solution Possible confusions • Phytophthora blight • Fusarium wilt
Page 29 | Capsicum Guide Book
