Chrysanthemums Repel roaches, ants, Japanese beetles, ticks, silverfish, lice, fleas, bedbugs, spider mites, harlequin bugs and root-knot nematodes. The ingredient in chrysanthemums that makes them so effective as an insect-repelling companion plant is pyrethrum. Read more: http://www.mnn.com/your-home/organic-farming-gardening/stories/12-plants-that-repel-unwanted-insects#ixzz3G029OPFM
10 tips for getting rid of Japanese Beetles How to get rid of Japanese beetles naturally. Just plant some plants that repel them: catnip, rue, larkspur, cloves, garlic, tansy, and geranium. These natural ways to rid your outdoor plants of Japanese beetles and prevent Japanese beetle damage and prevent additional damage have been used successfully for years by farmers.
Plants have best friends just like people do: Marigolds help tomatoes and roses grow better. Nasturtiums keep bugs away from squash and broccoli. Petunias protect beans from beetles. oregano chases them away from cucumbers. Geraniums keep Japanese beetles away from roses and corn. Chives make carrots sweeter. Basil makes tomatoes even tastier.
7 Safe Ways to Get Rid of Japanese Beetles in the Garden
Eggshells as Organic Pest Control ~ Allow eggshells to dry a couple of days, grind shells using a designated coffee grinder. After grinding, sprinkle directly on any beetles, sprinkle liberally on damaged leaves and around base of plants against slugs, snails and flea beetles. Reapply after a heavy rain.