Cabbageworms - Handpick and destroy. Row covers may be useful on small
plantings to help protect plants from early damage. Put in place at
planting and remove before temperatures get too hot in midsummer.
beetles - Use row covers to help protect plants from early damage. Put
in place at planting and remove before temperatures get too hot in
midsummer. Control weeds.
Cabbage root maggot - White maggots
(larvae) attack all plants of the cabbage family. Larvae tunnel in and
feed on roots of plants. Damage causes wilting early on, death of
plants a little later on.
Cabbage aphids - A hard stream of water
can be used to remove aphids from plants. Wash off with water
occasionally as needed early in the day. Check for evidence of natural
enemies such as gray-brown or bloated parasitized aphids and the
presence of alligator-like larvae of lady beetles and lacewings.
Slugs and snails