 If you're growing tomatoes, you know there are several things that can cause tomato trouble. K-State instructor and horticulture extension specialist Cynthia Domanghini covers how hot weather, fungal diseases, and hornworms can all cause problems. Cynthia, no doubt a lot of questions coming in about tomatoes because it is the most popular crop in the garden and a lot of questions especially this time of year because we start to see the temperatures go up and that can have an impact.