By Method or Item:

Hand Picking – Slugs, Squash bugs, Japanese Beetles, Tomato hornworms,

Row cover - Squash bugs, Imported Cabbageworms, Cucumber beetles

Crop rotation – Fungus, Squash bugs, Squash vine borers,

Chickens – Variety of insects can be controlled by chickens.

Cardboard tissue rolls – Protect seedlings from cutworms.

Yellow sticky traps – Cucumber beetles

Canola or olive oil – Corn earworms. A few drips of canola or olive oil into the tips of ears, right when the silks start to show.
 
Dishsoap and water solution – Whitefly
 
Fels-Naptha soap - Soft bodied insects, such as aphids, and for little sugar ants.
Available in grocery stores, is an effective nontoxic insecticide. This insect spray is economical and environmentally safe for indoors or in the garden.
To make the insecticidal soap spray, shave one quarter of a bar of Fels-Naptha laundry soap (about 1 inch) into 1 quart of heated water and stir until dissolved. This will be your insecticidal soap concentrate. Put the soap solution into a labeled jar.
To use the soap spray, put 1 teaspoon of concentrate per quart into a sprayer. This insecticidal soap is a contact poison, so spray it directly onto the insects you want to eliminate from your home, garden or orchard. For additional killing power, add one-quarter cup of rubbing alcohol per quart.
 
Insect resistant vegetables – Butternut squash,

Diatomaceous Earth (Diatomite) – Ants, Ticks, Fleas, Cockroaches, Bedbugs, Slugs. Used as an insecticide, due to its physico-sorptive properties. The fine powder absorbs lipids from the waxy outer layer of insects’ exoskeletons, causing them to dehydrate.Arthropods die as a result of the water pressure deficiency, based on Fick’s law of diffusion. This also works against gastropods and is commonly employed in gardening.

Lavender Oil – Dab on your skin to repel Mosquitoes

Cider Vinegar – Drink 2 tablespoons in a glass of water for a pore-emitted Mosquito repellent.

Catnip – Catnip simmered water sprayed near baseboards to repel cockroaches.

Boric Acid – Boric acid was first registered in the US as an insecticide in 1948 for control of cockroaches, termites, fire ants, fleas, silverfish, and many other insects. The product is generally considered to be safe to use in household kitchens to control cockroaches and ants. Boric acid is poisonous if taken internally or inhaled in large quantities. However, it is generally considered to be not much more toxic than table salt.

Garlic Barrier Insect Repellent (brand name) - A strong liquid garlic concentrate, dilutes in water and is sprayed on farm and garden plants to keep insects off. EPA registered. Odorless in minutes. Listed for organic farms by OMRI and CCOF. No chemicals, non-toxic. Garlic is absorbed through pores (stomata) on plant foliage and travels systemically throughout the entire plant. It protects roots, stems, leaves, flowers, and fruit. It does not alter the taste or smell of any part of the plant to humans or livestock. Use in areas that attract mosquitoes, gnats, deer flies and other pests to humans, pets, and livestock. The key to using garlic effectively as a repellent is to apply it to plants before there is a pest problem.

 Neem Oil – Squash bugs, insects. A natural control for many insects, mites, and fungi. It functions well as an “antifeedant”, discouraging insects from feeding but not directly killing them. It can be watered in or applied as a foliar spray. Neem oil is pressed from the seed of the neem tree (Azadiracta indica Juss.). This tree, native to eastern India and Burma, has a 4,000 year history as a medicinal herb and insect repellent

How it works: Naturally occurring compounds in neem oil discourage feeding on treated plants. When ingested, neem disrupts the molting and reproductive cycles of many insects. (In tests, desert locusts, which are voracious herbivores, will sooner starve to death than eat plants treated with neem). Neem has proven remarkably non-toxic to birds, mammals, and beneficial predators like ladybugs, spiders, bees, and wasps.
General usage: Use on vegetable and flower gardens, ornamentals, greenhouses, orchards, field crops.

Surround WP Kaolin Clay – Insect Repellent. Surround can help control pests such as: pear psylla, cutworms, pear midge, pear slug, apple sucker, climbing cutworm, eastern tent caterpillar, gypsy moth, japanese beetle, june beetle, grasshoppers, green fruit worm, leafrollers, lygus bug, mormon cricket, cicada, stink bug, tarnished plant bug, thrips, fabria leafspot, apple maggot, codling moth, plum curculio, rose chafer, aphids, naval orangeworm, husk fly, blueberry maggot, blackberry psyllid, flea beetles, orchards, grape leaf skeletonizer, bean leaf beetle, mexican bean beetle, powdery mildew, cucumber beetle, boll weevil, armyworm, black vine weevil, and fruit flies.

Surround W. P. is made from 95% kaolin clay, a naturally occuring mineral. When applied to fruit trees, crops, and other plants, it forms a white film. Surround suppresses a wide range of pests, especially those which damage fruit crops including pears, apples, grapes, berries, and some vegetables. It can be applied up to day of harvest and is easily rubbed off when the fruit or produce is ready to eat.

How it works
Insects are repelled by Surround. It sticks to their body parts and encourages them to move on elsewhere. At harvest time, the white film can be removed simply by rubbing off.
General usage
Use in orchards, fields, vegetable gardens.

Deer Off – Deer, rabbits, squirrels, ticks.

A pungent repellent for deer and other animals, made from eggs and garlic. Its effectiveness has been proven by a Rutgers University study that found that DEER-OFF repelled deer up to three times longer than the next most effective product and it can be sprayed on edible crops safely. Also repels other animals (rabbits, squirrels, etc) that browse and feed on flowers, grass, shrubs, bulbs, edible crops, trees.
How it works: Deer-Off effectively repels deer. An added benefit includes a reduction in the number of Lyme disease carrying ticks in treated areas without the use of dangerous insecticides and pesticides.
General usage: A Rutgers University study that found that Deer-Off repelled deer up to three times longer than the next most effective product. It can be sprayed on edible crops safely.

Sweet Alyssum, other flowers & Hover Flies – Aphids. By attracting beneficial insects. Other flowers include: calendula, borage, zinnias, cosmos and nasturtiums.

Paper Wasps, Yellow-Jackets - Imported Cabbageworms,

Parasitic braconid wasps – Tomato hornworms,

By Insect:

Aphid: Insecticidal soap, attracting beneficials, horticultural oil

Armyworm: Bt (Bacillus thuringiens), handpicking, row covers

Asparagus beetle: Poultry predation, neem, handpicking

Blister beetle: Poultry predation, neem, handpicking

Cabbage root maggot: Crop rotation, beneficial nematodes, diatomaceous earth

Cabbageworm: Bt, handpicking, row covers

Carrot rust fly: Crop rotation, beneficial nematodes, diatomaceous earth

Colorado potato beetle: Poultry predation, neem, handpicking

Corn earworm: Bt, horticultural oil, beneficial nematodes

Cucumber beetle: Poultry predation, neem, handpicking

Cutworm: Rigid collars, Bt, diatomaceous earth

Flea beetle: Insecticidal soap, garlic-pepper spray, row covers

Japanese beetle: Handpicking, row covers, milky spore disease

Mexican bean beetle: Poultry predation, neem, handpicking

Onion root maggot: Crop rotation, beneficial nematodes, diatomaceous earth

Slugs: Handpicking, iron phosphate slug bait, diatomaceous earth

Snails: Handpicking, iron phosphate slug bait, diatomaceous earth

Squash bug: Handpicking, good garden sanitation, neem

Squash vine borer: Growing resistant varieties, crop rotation, beneficial nematodes

Stink bug: Handpicking, good garden sanitation, neem

Tarnished plant bug: Handpicking, good garden sanitation, neem

Tomato hornworm: Bt, handpicking, row covers

Whitefly: Insecticidal soap, attracting beneficials, horticultural oil

 

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