gummy stem blight of watermelon

Gummy stem blight Figure 1. Gummy stem blight causes dark, amorphous, necrotic lesions on watermelon leaves.
 Gummy stem blight Figure 2. Gummy stem blight lesions on watermelon leaves sometimes have a ring-like structure.
gummy stem blight lesion. Figure 3. Underside of a watermelon leaf with a gummy stem blight lesion.
 gummy stem blight Figure 4. Large gummy stem blight lesion along the midrib of a watermelon leaf
gummy stem blight Figure 5. Close up of gummy stem blight lesions on a watermelon leaf, one lesion with a shot-hole.
 Lesion of gummy stem blight Figure 6. Lesion of gummy stem blight on a watermelon leaf petiole.
gummy stem blight Figure 7. Lesion of gummy stem blight on a watermelon stem. The brown ooze or gum does not always occur in association with this disease and many other diseases and injuries to the stem may cause such an ooze.
gummy stem blight Figure 8. Fruiting bodies, pycnidia, on a watermelon leaf petiole.
 gummy stem blight Figure 9. A field of watermelon with a severe outbreak of gummy stem blight manifested by defoliation and numerous lesions.