How to Get Rid of Colorado Potato Beetles

If you have a potato beetle infestation, it’s time to get to work, and there are several actions to take. 

Prevention and Monitoring

The best way to prevent potato beetles from derailing your future spud enjoyment is a little prevention and monitoring. Like any pest, their numbers will swell when conditions are ideal, so get a head start on thinning their ranks. 

• Remove alternate hosts. Soon after emergence in spring, the adults will need to feed. If your potatoes are not up yet, they will look for other plants like nightshade and ground cherry. Keep those out of your garden and surrounding property to deny them food.  
• Choose early maturing varieties of potatoes. You can plant these quick-producing varieties at the usual time of year. They will be winding down when the heavier infestations occur mid to late summer. You can also plant these varieties later in spring to avoid providing food to emerging adults. Without a food source, they will search elsewhere to lay their eggs.
• If the infestation was particularly nasty, consider taking a year off from growing potatoes. The adults will emerge and fly off to find a new food source. If your neighbor is growing potatoes on the next lot over, this may not work. Adults will travel a quarter mile or farther to find suitable egg-laying conditions. 

How to Get Rid of Potato Beetles

Potato beetle larvae can quickly decimate plants. More than 30% defoliation will affect your harvest, and severe loss of leaves could even kill the plant. Early monitoring and detection are crucial to getting this problem under control. Don’t let it wait until the weekend.

Grab a pail and some gloves

Potato beetles in the garden can often be removed by hand. A little soapy water in the bottom of an old ice cream pail and a pair of gloves make this task easier. 

In the early part of the summer, watch your plants for adult beetles or for tell-tale damage to leaves. Pluck off any adults you see and dispose of them. 

As the season progresses, watch for eggs on the undersides of the leaves. They are bright orange and clustered together. Smash them with your thumb or rip the leaf off and destroy it. 

Once the larvae appear, brush or shake them off into your pail. You will need to do so daily for a week or two to control the flush. 

A fowl solution

If you don’t want to drown them, the larvae can be a treat for your chickens. As a kid, our chickens figured out that a tasty morsel would come if I had an old ice cream bucket in my hand. The hens would start to cluck and run around, maneuvering for the best position to grab a larva as I dumped the bucket over the fence. In a few seconds, no more bugs.

A flock of chickens or ducks loose in your garden might not be advisable during the middle of summer. But, they can be excellent helpers during spring and fall. Chickens especially will scratch and hunt up larvae, pupae, and adult bugs that would otherwise spend the winter in the soil of your veggie patch. 

They will also make eggs out of late-season weeds, weed seeds, and other garden problems. If you have some backyard hens, try turning them loose in your garden a few weeks before planting or after harvest. 

Sprays and other applications

Many people are finding that the Colorado potato beetle is growing resistant to common pesticides. 

Some gardeners have found success against larvae with Neem oil, but it should be used sparingly and only if removal does not work. Neem oil can cause problems with beneficial insects and pollinators in your garden. 

Natural predators can be encouraged but seldom will solve an infestation for you. They are more effective at keeping populations low if they are present in the first place. Keep habitat for predatory wasps, songbirds, and ladybugs on your property. 

Bluebirds, in particular, can be beneficial gardening partners. Provide some perching spots and nest boxes near the garden. Building up your garden’s natural defenses is a long-term project that pays dividends for years to come.

However you combat them, the key to saving your potato crop is early detection and early action. Keep an eye out and get hopping at the first sign of a problem.