I noticed small holes in my kale and was concerned. When I looked under the leaf I saw this green worm (easy to spot). On more inspection I identified another 15 worms on this kale plant and another few on a different kale plant (same type). I have a number of questions. What is this worm? How did it get there all of a sudden? How do they multiply? How do I get rid of them organically? Will it attack other types of kale plants I have in the same raised bed? Will it attack yellow squash plants in the same raised bed?
I've seen these little dudes often. They can damage quite a bit...see the white moths, their parents? Very common. This is the first article I've found that give 'yellow jackets' or wasps a bit of credit. They love these yummy little caterpillars. Bt is another perfect 'pesticide to spray but please do it at night and only on the brassiccas; cabbage, broccoli, kale...next year create a chunk of your garden early to grow kale or another tough brassica, before planting your cash crop. These cabbage worms and parents will gravitate to your 'trap crop' to do their thing and LEAVE your garden.
Yellow Jackets or wasps eat these larvae. They love them.
These 'worms' are larvae of those white moths. Trap crop or Bacillus thuringiensis and yellow jacket wasps are the best controls.
Bt is a bacteria that makes this 'toxin' that when eaten by caterpillars, or larvae of these moths eat leaves sprayed with Bt actually 'feel full' and stop eating. Immediately. They die of starvation. I've always thought that that might make a great 'diet miracle pill'...the damage these little 'worms' doesn't make your crop inedible. Totally safe...wash before eating. Use a cup of hydrogen peroxide to 5 gallons of water to wash your vegetables. Rinse again with plain water, shake and use in your salads or whatever. Growing your own is very smart.