Leaf roll

Leaf roll is a physical disorder of tomatoes associated with hot dry weather but it can occur in response to other stresses like fast growth and pruning. This disorder is believed to be a strategy to conserve moisture.

*Leaf margins roll upward until they touch or overlap.

*Affected leaves are firm and leathery to the touch.

*Lower leaves are commonly affected first.

*Once leaves roll, they will not unroll even if weather conditions become cool and wet.

In severe conditions, the entire plant may exhibit leaf roll.

*Leaf roll does not noticeably reduce plant growth or yield.

*Some varieties exhibit leaf roll more easily than others.

*Leaf roll is very common in tomatoes grown in hoop houses.

*Leaf roll does not reduce plant growth or tomato yield, so no management is necessary.

Sun scald

Sun scald occurs on tomato fruit that have been exposed to too much sun. This is common in plants that have lost leaves from a leaf spot disease or insect feeding, but can also occur on plants that are over pruned or on fruit that are otherwise exposed to the sun.