As a naturalist, it is difficult for me to make distinctions between good bugs and bad bugs. Each living thing plays an integral part in the ecosystem. I know that without Tomato hornworms, we would not have Mottled Brown Moths that help pollinate our plants. And yet, hornworms are voracious eaters that wreak havoc in our tomato beds. Interesting that nature has a way of keeping things in balance. Wasp larvae feed on hornworms and keep the population under control. So, best to keep the wasps around and let nature run her course!! Well, you may wantto remove the infected hornworms, anyway. They continue to devour tomatoes for several days before they are subdued.