A. Nice job identifying those monster caterpillars! The pest prefers members of the Solanaceae family, but the tomato appears to be its favorite. If you have peppers, eggplants, or potatoes, watch out for them. And weeds from the nightshade family such as horse nettle, nightshade, and Jimson weed can serve as alternative hosts. Physical removal of the worms may be the best choice to control, but that requires constant monitoring of your plants. As you know, tomato hornworms can cause serious damage in a short period of time if not controlled. You have to be careful when going this route.
