My tomatillo plants are infested with some sort of green caterpillar or larvae that's chewing holes in the husk, fruit, and leaves. It is not bothering the nearby tomato plants. Any ideas on what it is and how to get rid of it?
These are cutworms. The best thing I have found is to go outside at night with a flashlight. Cut these guys in half with a pair of scissors. Green guts. But better than pesticides. BT is a 'good' pesticide on the scale of pesticides (herbicides, miticides, fungicides...) but cutworms are usually few in number. One or two can do huge damage. They come out at night to eat and they can power down some plant material.
If you find more than 4 or 5 during your nightly killer stalker thing, let me know!
One might conclude these guys came from the nursery, 'gee thanks'! Send a few more pictures and how many do you find on one plant? Rake the soil around your tomatoes and collect debris. Rake the soil around the tomatillos as well and dispose of the debris. Let's make sure of this idea first before treating, okay?