The following question was sent to the P&PDL diagnosticians here at Purdue University:

Question: Last year the leaves on my tomato plants curled. I don't know if it has anything to do with it or not, but during the month prior to the curled leaves, we had a lot of rain. What do you think the problem is? What should I do to prevent the problem next year

Answer: The following answer was provided by By Bev Netzhammer, Advanced Master Gardener, Purdue University (http://www.hort.purdue.edu/ext/ITG_August97.html) as she answered a similar question.

Many tomato diseases, including curly top, mosaic, and fusarium, begin with rolling leaves. But if no other symptoms appear, it's probably (aptly named!) tomato leaf roll. It's a temporary disorder resulting from excessively wet soil, especially after heavy rains. It doesn't affect the plant's growth, and a normal crop of fruit is produced. The rolling disappears in a few days when the soil dries out. 'Big Boy', 'Floramerica' and 'Beefsteak' are affected most often.

Information listed is valid only for the state of Indiana.

The information given herein is supplied with the understanding that no discrimination is intended and no endorsement by the Purdue University Cooperative Extension Service is implied. Any person using products listed assumes full responsibility for their use in accordance with current direction of the manufacturer. Purdue University is an equal opportunity/equal access institution.