Answer: Beneficial insects, including ladybeetles, lacewings, parasitic wasps and predaceous flies, feed on other insects, and can help keep pest insect populations in check. By including certain attractant plants in your garden, you'll offer an alternative food source for beneficials when pests are in short supply. Many of these plants are members of the carrot and daisy families; some good choices are angelica, anise, dill, fennel, yarrow and zinnias. Avoid using any broad-spectrum insecticides because these will harm beneficial as well as pest insects.
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