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7 Easy DIY Recipes For Deterring Garden Pests, Diseases, And Unwanted Wildlife


Keep pests, diseases, and critters out of your garden with a homemade spray you can whip up in less than five minutes.

spraying plants
Even the most organic of gardeners wants to deter insects or a creeping case of plant spots. Luckily, you can keep away pesky garden visitors with a simple, inexpensive, homemade—and most importantly, nontoxic—spray that won’t harm you, your pets, or your plants.

Safe as these remedies are, it’s a good idea to test them first on a plant leaf before going whole hog and dousing your entire garden. Spritz them on the leaf and wait a day to see if they cause damage. Also, keep them out of your eyes and off your skin, especially those containing pepper.

 

spraying basil plant
Insects

WATER

All by itself, water can be surprisingly effective against whiteflies or aphids. Turn your hose nozzle to a fine spray and blast the pests off the leaves, making sure to hit the undersides, too. For outdoor plants, knocking most of the pests off will often allow beneficial insects to move in and keep the remaining population in check.

BUBBLE BLASTER

If water alone doesn’t work, add soap. The natural fatty acids in soap dissolve the outer coating or shell of many insects, eventually killing them. So you just need to get the pests wet, not knock them head over teakettle (not that that isn’t satisfying). Soap spray can help you manage a wide variety of garden pests, including aphids, scalemites, and thrips.

A basic recipe: Put 1 teaspoon natural dish soap or liquid castile soap, such as Dr. Bronner’s, into a one-quart spray bottle and top it off with water. Spray on insect-infested areas, remembering the undersides of leaves and stems. Repeat whenever live insects are present.

SERGEANT PEPPER’S REVENGE

Garlic and hot pepper are both great ways to ramp up the killing power of soap spray and make your plants temporarily taste less appealing to some pests.

  • 1 small bulb garlic (about 6 cloves)
  • 1 small hot pepper or 1 teaspoon hot sauce
  • 1 teaspoon natural dish soap

Chop the garlic and pepper and put them in a blender with about a cup of water and puree until smooth. Let the mixture steep for at least an hour (or overnight in your refrigerator) and then strain it through a coffee filter to remove the solid bits, which will clog your spray bottle. Pour the resulting garlic-pepper juice into a one-quart spray bottle, add the soap, and top off with water.

 

spraying for plant diseases
Diseases

BAKING SODA SPOT BUSTER

This simple spray is useful for fighting black spot on roses and other fungal diseases on all sorts of plants. It will also discourage many insects.

  • 1 teaspoon baking soda
  • 1 teaspoon vegetable oil
  • 1 teaspoon natural dish soap or liquid castile soap
  • 1 teaspoon vinegar

Dissolve the baking soda in about a cup of warm water, put it and the rest of the ingredients into a one-quart spray bottle, and top off with water. Remove badly damaged leaves first then spray lightly on all plant surfaces. Repeat once a week or after every rain. This spray will keep indefinitely at room temperature.

ANTI-MILDEW SHAKE

Researchers have found that diluted milk is as effective as the strongest synthetic fungicides for fighting powdery mildew on grapes, squash, and other plants.

  • 1/4 cup milk
  • 4 drops natural dish soap or liquid castile soap

Put the milk and soap into a one-quart spray bottle and top off with water. Spray lightly on all surfaces. Repeat once every two weeks or after every rain. This spray doesn’t keep, so pour out any leftovers and clean out the sprayer after each use.

rabbit eating flowers
Wildlife

If animals think of your garden as the local salad bar, here are a couple of sprays to try. There’s no guarantee they’ll work, depending on how many critters there are and what their other options are, but they are inexpensive and worth a try.

PEPPER HOPPER CHASER

  • 1 ounce hot pepper sauce (the hotter, the better)
  • 4 drops natural dish soap or liquid castile soap
  • 1 cup fresh marigold, artemesia, yarrow, or other aromatic leaves from plants that your local rabbits avoid (optional)

 

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