What is causing my young broccoli leaves to be cut in a sharp, saw-like pattern? After an initial attack, the leaves have zig-zag patterns, with the upper part removed. The second attack takes the rest of the leaves down to the stalk. These are young plants, just transplanted into the earth, but I am also getting attacks in plants still in my starter trays. I have examined the leaves carefully and I do not observe any insects.
Broccoli With Cut Leaves
Certified GKH Gardening Expert
Cutworms are the likely pests and Broccoli is a favorite food of Cabbage Worms, Aphids and Flea Beetles.
Treat with Neem Oil and you may want to use a covering to help protect your young seedlings and plants.
Here are some links to help you.