angular leaf spot of watermelon

Angular leaf spot of watermelon includes round, light brown necrotic lesion with chlorotic halo. Figure 1. Angular leaf spot of watermelon includes round, light brown necrotic lesion with chlorotic halo.
Angular leaf spot on watermelon leaf has caused dark, necrotic lesion on cotyledon. Figure 2. Angular leaf spot on watermelon leaf has caused dark, necrotic lesion on cotyledon.
Several watermelon transplants have lesions of angular leaf spot. Figure 3. Several watermelon transplants have lesions of angular leaf spot.