Sasha CampbellOnce you spot one Colorado potato beetle, there could be more hiding in your garden. These beetles are known simply as potato bugs.
They are a challenging pest to control and cause significant damage to potato crops [1]. The larvae eat a lot. They are responsible for most of the crop damage.
The estimated crop losses by some commercial and large-scale growers are tremendous. As a result, we will discuss how to get rid of potato bugs, their larvae, and eggs.
Identification
The Colorado potato beetle (Leptinotarsa decemlineata) gets its name from its favorite plant, the potato [2]. They are commonly called Colorado potato beetles, though some people also refer to them as potato bugs.
An adult has a round, orange-yellow body and ten black stripes on their wing covers. These stripes give it the nickname ‘ten-lined potato beetle’ and sometimes ‘ten-striped spearman.’
How to Get Rid of Colorado Potato Beetles Naturally
Before heading for store-bought pesticides, try home remedies and organic approaches to control Colorado potato beetles.
The most effective approach combines prevention, manual removal, and targeted organic treatments.
1. Crop Rotation
Rotating seasonal crops is a simple way to get rid of potato bugs. Rotate your potatoes and other affected crops every three to four years.
2. Row Covers
These covers protect plants from certain pests. They prevent flying insect pests from landing on your plants and causing damage.
3. Repellent Plants
Using plants to deter pests is one of the best organic pest control methods.
Plants that repel Colorado potato beetles include tansy, coriander, marigolds, nasturtiums, and catnip. Use these as companion plants to help keep pests away.
4. Soap and Water
You can also use soapy water to manage Colorado potato beetle populations in the garden.
You only need two tablespoons of liquid soap in a gallon of water. Some people use Dawn dish soap, but any liquid soap will do.
Next, shake off the beetles onto the ground, pick them up, and drop them into the soapy water. This solution will suffocate and kill the beetles.
5. Mulch
Mulching will help the plants grow. It may also support beneficial insects, including ground predators that feed on beetles.
Straw is one of the most popular and effective organic mulches, but others will work just as well.
6. Handpicking
Handpicking is an organic, cost-effective method for naturally killing potato bugs.
Put on gloves. Then, pick off the bugs. Check the undersides of the leaves. That’s where they and their young ones like to hide.
Either squish them underfoot or throw them into a pail of soapy water.
7. Trap Crops
Besides using companion plants to deter the beetles, you can use plants to draw them away from your vegetable garden.
Colorado potato beetles strongly prefer potatoes and may also feed on related plants like tomatoes and eggplants. The beetles will likely flock to these trap crops, helping reduce pressure on your main crop.
However, trap cropping works best with careful management. If not monitored, beetles can still move back into the main crop.
8. Natural Predators
Some natural enemies can easily prevent Colorado beetles from attacking your potatoes.
Among the potato beetle predators are:
- Ladybugs
- Predatory stink bugs
- Green Lacewings
- Some parasitic wasps
- Damsel bugs
- Birds
Most natural predators target eggs and early-stage larvae rather than adult beetles.
9. Garlic Spray
Garlic is a natural repellent that may help deter Colorado potato beetles.
It contains sulfur compounds that many pests find unpleasant. This discourages them from staying on treated plants.
To make a homemade spray for Colorado potato beetles, blend 4 to 5 cloves of garlic in 2 cups of water. Strain the mixture, then add 1 teaspoon of liquid soap to help it stick to plant leaves.
Spray directly on the leaves, especially the undersides where beetles and larvae are commonly found.
Reapply every few days or after rain for the best results.
10. Destroy Eggs
These beetles lay their eggs underneath the leaves of their target plants. So, check every leaf for eggs and then destroy those leaves!
Once you see an adult beetle, start looking for eggs.
11. Diatomaceous Earth
Diatomaceous earth (DE) can kill many crawling insects when they crawl over it under dry conditions.
If applied correctly, this home remedy will kill Colorado beetles and their larvae. It works by damaging their outer layer and causing dehydration.
Sprinkle it on your plants, targeting the areas where the beetles are likely to crawl.
You can also apply diatomaceous earth directly to plant leaves as a dry dust. Reapply after rain or watering.
Use food-grade DE for crawling insect control where appropriate. However, it is recommended to wear a protective mask when applying DE, even if it is food-grade.
12. Spinosad
One of the best organic insecticides for potato bugs is spinosad.
It paralyzes the nervous systems of larvae and mature bugs. It eventually cripples and kills them.
However, this killer spray solution is also toxic to bees. Therefore, avoid applying it to flowering plants where bees are actively foraging.
Apply in the evening when bees are less active for added safety.
13. Neem Oil
This oil is an extract from neem seeds. It is an excellent home remedy for organic control of potato beetles.
Neem oil is also great for killing many other harmful insects organically. You can use it as a store-bought concentrated solution.
You can also make your insecticide spray by mixing 2 tablespoons of pure neem oil with 1 gallon of water. Add 2 tablespoons of liquid soap to the mixture, then spray it on the insects wherever you find them.
If sprayed directly, this natural Colorado potato bug spray will kill the bugs and their eggs.
Takeaway
Most of the methods mentioned above for controlling Colorado potato beetles are commonly used in organic gardening. However, effectiveness varies depending on conditions and application.
Add comment