Copyright 2000 Scott Trunkhill and Arthur Times Jr. Marigolds repel a variety of insects, including bean beetles, aphids, nematodes and slugs.
French marigolds help control root-knot nematodes.
Nasturtiums attract aphids, protecting other plants from them, and will also repel other insects. Sowing chick peas with cabbage will repel caterpillars. Black nightshade and horseradish can be used to repel potato beetles in the potato patch. Cucumbers plants with corn are often less infested with cucumber beetles. Planting beans with collards will reduce the aphids on the collards.