Are you a Tarantula hobbyist? If so, we invite you to join our community! Once you join you'll be able to post messages, upload pictures of your pets and enclosures and chat with other Tarantula enthusiasts. Sign up today!
Depending on the size of the mealworm it maybe ignore it if it's intimidating by it's size. Personally, when I had a small sized sling, I used small crickets and crushed it's head with the tweezers and left it in to be found eaten later. Never tried crushing a mealworm before though, might have to try it some time lol