Backyard Aquaponics
A place to discuss aquaponics

It's unlikely you will ever get rid of aphid. The water will knock them off the plants but they will climb back up.

Some people release ladybugs or plant flowers that attract ladybugs like assylum.

Personally, when i start seeing signs of aphids i sprinkle some diatomaceous earth on the plants and on teh gravel around the plants and it seems to keep them at bay

It's unlikely you will ever get rid of aphid. The water will knock them off the plants but they will climb back ..... i sprinkle some diatomaceous earth on the plants .....

As per your title...If you hold the little f....kers under water by the throat, seriously i get absolutely hammered by black,green and white aphids,the only thing for me here in Thailand is Tobacco spray,i take a lump of rough cut baccy,soak it in water for 24hrs,strain it off then dilute and spray,for me it reduces the numbers.
This time around i am trying companion planting,aphids don’t like quite a range of plants,onions and mint for two,so i am planting these throughout the beds to see what happens along with the garlic and baccy sprays.

Instructions

Garlic Pesticide
1

Puree 15 garlic cloves and 1 pint of water in a food processor or blender.
2

Strain the mixture through cheesecloth into a clean spray bottle.
3

Spray the tops and undersides of all leaves.
4

Repeat every few days until the pests are gone.
Rubbing Alcohol Pesticide
5

Mix ½ cup rubbing alcohol with 1 quart of liquid soap directly into a spray bottle.
6

Spray on vegetable plant leaves. Allow to sit for 20 minutes.
7

Spray plants with clear water to minimize foliage damage.
8

Spray every three days for two weeks.
Orange Peel Pesticide
9

Pour boiling water over orange peels.
10

Allow it to steep for 24 hours.
11

Remove the peels and strain the mixture.
12

Mix in a few drops of castile soap.
13

Spray on plants as needed.
Horseradish Pesticide
14

Boil 2 quarts of water.
15

Add 2 cups of cayenne peppers and a 1-inch piece of horseradish root.
16

Allow mixture to steep for one hour. Let cool.
17

Strain mixture. Pour into spray bottle.
18

Spray on plants to eliminate aphids, beetles, caterpillars and whiteflies.
Rhubarb Pesticide
19

Boil 1 lb. of rhubarb leaves in a few pints of water for 20 minutes. Allow it to cool.
20

Strain into a container.
21

Add a small amount of dish detergent to allow the mixture to adhere to vegetable plants.
22

Spray on plants to kill aphids and spider mites.
Tomato Leaf Pesticide
23

Soak 2 cups of tomato leaves in water overnight.
24

Strain the mixture and add 1 pint of fresh water and ½ tsp. of liquid soap.
25

Spray foliage and soil to control asparagus beetles, flea beetles and earworms.

Tips & Warnings

According to the Fraser Info website, alcohol sprays work on aphids, mealybugs, scale insects, thrips and whiteflies.

Rubbing alcohol can be caustic to the eyes. Wear protective glasses when spraying plants.

According to Colorado State University, dry dish soaps and all clothes-washing detergents are too harsh to be used on plants and should not be used as organic pesticides on vegetables or other plants.

The Canadian Broadcasting Company warns gardeners to not ingest rhubarb spray, which contains high amounts of oxalic acid and can have serious effects on the heart.