Few differences were noted between locations. In 1998, leaf litter accumulated mostly from March to June with some leaf litter in Immokalee in the fall and winter. Trap plant infection occurred earlier in Immokalee than in Lake Alfred. It appears that greasy spot is no longer a strictly monocyclic disease. Infection can occur year round and is only low in the winter months.
Considerable infection can occur in the spring even though the weather is relatively dry.
The large number of ascospores that are produced at that time probably produce enough epiphytic growth in moisture from dews and occasional rains to cause considerable infection. In late summer and early fall, when ascospore numbers are low, moisture conditions are so favorable that epiphytic growth and infection is still high. Earlier production of ascospores and slightly more favorable conditions in Immokalee make the disease more severe there than in Central Florida. Because of the long infection period which now occurs, more sprays are likely to be needed to control the disease. In 1998-99, we conducted spray timing trials using single copper sprays in April, May, June, July, and August in Ft.