Although red netting generally isn't used, a 2015 study showed that when crops were irradiated with red light, pest insects known as onion thrips (Thrips tabaci) tended to stay away from the plants.

Dear Helen: I have been gardening for many years, but over the past five growing seasons my leafy vegetables, such as chard, spinach and beet leaves, have been damaged by leaf miners. I try to remove ...