Quote:
Originally Posted by Hemlock140
You no doubt have the infamous tomato hornworm. Those are their droppings, and they lay eggs on the underside of the leaves, the curling protects them. Cut off and burn or throw the affected leaves in the trash. If not too many you can try to find them pick off and stomp. You can also treat with BT, which is a bacteria safe for beneficial insects and can be applied right up to harvest time.
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^ This.^
Hornworms are pretty easy to deal with, but you must act quickly at the first sight. Where there is one there are usually more and they are SNEAKY. Even though they can get larger than your middle finger (ew, by the way), they are notoriously difficult to find. 3 or 4 mature worms can strip a tomato plant overnight.
I hand picked them last season, as I only had a few, but the season before I used BT with excellent results.