Anthracnose is caused by Colletotrichum orbiculare and target leaf spot is caused by Corynespora cassiicola. It sporulates uniformly throughout diseased leaf tissue, unlike anthracnose which often clumps along leaf veins. Both diseases can cause losses through leaf and stem infections. Anthracnose is generally responsible for greater losses because it develops earlier and appears to be more virulent than target leaf spot. Both fungi are spread by wind, rain, farm implements and people.
Moisture is essential for infection.
It is not recommended to enter a field when the foliage is wet. Both fungi can survive in Fig. 2. Target leaf spot has also been found to cause leaf spots on papaya, tomato and green vegetable soybean. It is now distributed throughout the island, infesting a variety of vegetable crops. One of the characteristics of this new whitefly is the induction of silverleaf on zucchini and other plants.