What is causing my tomato leaf curl on two adjacent plants in a row of 4 and an adjacent row of 4 when none of the other plants are affected? The two plants do not have any yellowing of the leaves which would suggest a virus. Yellow leaf curl is common here in Houston, Tx. New growth is stunted with with severely curled small leaves. About a year ago I used a weed& feed on my lawn for the first time and caught myself dumping one bag full of grass clippings into my compost pile about 5 ft away. I stopped. My problem could be chemical related, but it doesn't be explain why the adjacent plants show no signs of distress.
Tomato Leaf Curl
There are several possibilities. Have you inspected closely for tiny insects outside and inside the curl? There is a tomato leaf curl virus but I'd think there would be yellowing if it were the culprit. This article covers the various reasons for tomato leaf curl: