... But It Looks Like I Won the War
Foil wraps and cardboard collars on plants in my plot and in containers on my porch have defeated the cutworms. I also removed grubs and squashed them as I worked the soil. So, my tomatoes, basil, and remaining brocolli seedlings are fine.
The next strategy will be implemented against the ubiquitous flea beetles.
They are on my mustard.
My black bean seedlings are also tasty to them.
They like my green and runner bean seedlings. Rapid sprouting and growth has kept them ahead of the damage so far.
You might think that more plants appeal to flea beetles than discourage them. I would agree, based solely on their love of our community garden plantings. We've grown a smorgasbord for them.
Leaf lettuce is left alone, so far. Onions and garlic chives surround my lettuce beds, which may be detering them.
I prefer organic. It is important to remember that organic methods have less effect on the environment, but are not always without hazards. Follow instructions carefully, especially with chemicals applied to the plants or soil. Wash all vegetables before consuming them.
Diatomaceous earth, etc.
"Diatomaceous earth is one of the more effective repellents, applied as a dry powder to the plants. Horticultural oils and some neem insecticides also have some repellent effect on this insect."
Flea beetle photo from this web page, which has a long list of beetles: