The Bugman Lives By R L Stine

Here lies the Bugman. Woe to anyone who wakes him. Janet didn't mean to disturb the Bugman. It was an accident. She was just mowing the lawn when she ran over his tombstone.
Now insects attack her everywhere she goes. Wasps, bees, ants. Even a huge, hairy tarantula. Janet is afraid the Bugman is back from the grave -- and out for revenge.