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Do Aphids Drown in Water? (or Do They Survive?)

Do Aphids Drown in Water? (or Do They Survive?)

The presence of certain pests in your garden is not a good thing. Most pests will destroy and kill your plants, so you should eliminate them. One of the pests, aphids, must be eliminated from your plants. But is it possible to get rid of aphids by drowning them in water?

Aphids are tiny and have rounded, squishy bodies. The sap of plants is what the aphids primarily eat, robbing it of the nutrients it needs to flourish. It destroys plants by sucking out their sap, which results in stunted or dead shoots, browning, twisted and curled leaves, reduced yields, and the plant’s death.

You will be trying to find ways to get rid of aphids because they are a farmer’s greatest enemy. One of them is drowning; however, we’ll check to see if it’s that effective. We’ll also discuss whether using rain, coffee grounds, or hot water to eliminate termites is a good idea, what can instantly kill aphids, and why they keep coming back. 

Can You Drown Aphids in Water?

Aphids can be drowned, but be aware that the process is quite long and challenging. Long simply means that it will take some time. Aphids have a lengthy breath-holding capacity in water. As a result, it will take some time before you can be sure that every aphid has died in the water.

However, water is not something that aphids will necessarily avoid. You might even notice some aphids will play on water surfaces. When aphids come into contact with water, they do not perish. However, too much of it will kill them.

The aphids should be wholly submerged in water, as they float well. They can breathe oxygen while floating, which allows them to spend a long time submerged. The aphids must be completely submerged in water for at least 24 to 48 hours before they die.

Perhaps suffocation rather than drowning is the more accurate term. When an aphid is submerged in water, the water prevents its spiracles from absorbing oxygen. The aphids will finally die from suffocation.

Does Rain Keep the Aphids Away?

The aphids will drop off the plants due to the rain, but they will return in a few days.  By falling off, there is a possibility the aphids didn’t die. They hide in places where rainwater cannot reach them.

The aphids will return to the same plants once they are sufficiently dry. Aphids reproduce at a high-speed rate. Heavy rains may kill most aphids, but those that survive will restore the colony’s enormous population.

Can Aphids Survive in Water?

Aphids store oxygen in their exoskeleton, allowing them to stay fully submerged in water for a long time. The aphid’s ability to survive for a given period will depend on how much oxygen it has stored. Some aphids can survive for a few days.

The best technique to get rid of aphids might not be to drown them. The aphids store oxygen in their exoskeleton for later use. They can remain alive for a considerable amount of time underwater if they have enough oxygen stored. So the aphids can survive even when they come into contact with water.

The aphids must be submerged underwater for a long time if you don’t want them to survive in the water.

Will Hot Water Kill Aphids?

Aphids will be promptly killed by hot water. However, unless you have no further need for your plants, you shouldn’t even consider using this method. Your plants might get destroyed by hot water too.

When you add water that is too hot, you’ll end up killing your plants. Hot water can prevent plant roots from properly receiving water and nutrients from the soil. The plant’s cuticle will also melt away due to the hot water. The plant will then be exposed to pathogens, diseases, and pests.

As long as you don’t use boiling water on roots and protect plant leaves from it, watering your plants with hot water will not have any harmful effects.

Can Aphids Swim?

Aphids can swim, but not very well. It’s more like floating than swimming. However, there is a slight chance that the aphids will be able to swim out of the water that you are trying to submerge them with. That’s where it is essential to use a lot of water to ensure the aphids are submerged. 

Here is another reason why trying to drown the aphids is not the best way to eradicate them. Some of the aphids may manage to swim away and survive. When the plants are dry enough, the aphids come back. 

Can You Drown Aphid Eggs?

Aphid eggs can easily drown since they cannot swim and cannot breathe air to keep afloat. This approach may be the most successful in stopping aphid infestations. However, the process will only be effective if you can locate the eggs and drown them before hatching.

Nevertheless, if the eggs hatch, the young aphids would drown very quickly because they won’t know how to swim out or have the strength to do it. They are also still developing the ability to store oxygen in their lungs.

Another method that you can use to kill the aphid eggs entirely is by blasting your plants with water. Connect your garden hose to a tap and put it in a powerful setting. Attaching a Bug Blaster Nozzle to your hose will make this method more effective. 

What Instantly Kills Aphids?

You will need to take quick action to eliminate aphids due to the type of damage they can cause and their rate of reproduction. While the majority of treatments won’t quickly kill them immediately, the following should:

1. Methylated spirits

You should mix a small amount of water with methylated spirit. After that, you can spray the mixture on the aphids by placing it in a spray bottle. On contact, the mixture kills the aphids and any aphid eggs.

The aphids thrive in colonies and might be found on the same leaf or branch, which is advantageous. You can destroy lots of aphids at once by spraying them.

2. Diatomaceous earth

The aphids become dehydrated and die as a result of diatomaceous earth. You can spray it on the plants affected or apply it if you don’t have a lot of plants. Diatomaceous Earth of this particular brand is suitable for use on plants.

3. Liquid soap and water

Take a quart of water and one tablespoon of soap. Depending on the size of the area you wish to spray, you can increase the amounts of the two components. Put the mixture in a clean spray bottle after giving it a good shake. Insecticidal Soap is plant and environmentally friendly. 

To see how your plant will respond, spray a test area on a few leaves. There is no need to use a method that will kill the plants. To ensure you get all the aphids, you must repeat the same procedure for at least three days.

4. Squash them

You can squeeze the aphids between your fingers, instantly killing them. The only downside to this method is that you will not be able to do that to all plants. You can only use this method if you have a few affected plants. 

5. Predator insects

Ladybugs, spiders, birds, predatory wasps, and hoverflies are a few examples of predatory insects that you can introduce. These will all swiftly eat the aphids. To attract these predators, you must plant marigolds, lavender, sedum, alliums, and others in your garden.

Why Do Aphids Keep Coming Back?

One of the most resilient insects, the aphid, is generally challenging to eliminate. Most gardeners have complained that despite their best efforts to eliminate the aphids, they always manage to return to the gardens.

Aphids only survive for about a month, so why do they appear to be constantly coming back? Here are a few explanations:

  • Constant reproduction: Aphids have been known to reproduce very fast. It’s highly likely for every one aphid 100 are likely to take its place. Within its one-month lifecycle, the aphids will continually reproduce. When you treat the plants, the aphids that die are the adult aphids leaving the eggs and nymphs. Once they hatch, you have new aphids to worry about.
  • Move to new plants: The aphids relocate to a new plant when the one hosting them can no longer do so. They do this by flying there, falling off, or landing on the new plant. Aphids are pretty small and good at hiding. You treat the plant you had spotted earlier. The new plant will be heavily infested with aphids in one or two weeks, starting the cycle again. 
  • Reproduction without the need for both sexes: Aphids reproduce more by cloning; hence can reproduce without the presence of both sexes. Every several hours, the female aphids can give birth to their clones. It will only take the newly formed nymphs seven days to begin reproducing.
  • Brought by other insects: Aphids usually jump on top of ants to be transported to new plants. Weak aphids jump on the stronger aphids to get a ride as the strong ones to escape to newer plants.
  • Your garden is a hideout: Some aphids can detect predators and hide to escape them. When they think the threat has passed, they emerge, invade a new plant, and carry out the destruction. Vegetables with leaves are excellent aphid hiding places.

Do Coffee Grounds Keep Aphids Away?

Sprinkling used coffee grounds around the base of your plants will keep aphids away. Coffee has a powerful aroma that aphids dislike. To keep the aphids away, you will need to add fresh coffee grounds every three weeks.

The coffee grounds become fertilizers for your plants when they decompose. Additionally, they attract beneficial pests like earthworms. In dry locations, the coffee grounds also aid in soil moisture retention.

Therefore, if you have plants, don’t dispose of the coffee grounds in the trash after brewing your coffee. The grounds can repel some pests and help your compost pile grow.


It might be hard to eliminate aphids by drowning them, but we have provided you with alternative methods that you can use instead. We have also explained why aphids are the most difficult pest to eliminate and constantly appear to be around.