There are loads of different beetles that munch on potato foliage. The most common is the Colorado potato beetle which is yellow with black stripes.There are several different products that are listed for organic gardening and that you can use to kill beetles.
- Any pesticide containing pyrethrin should work.
- Bonide makes a Pyrethrin Garden Insect Spray that will control many different types of insects.
- Bonide Garden Dust contains pyrethrin to kill insects and also sulfur and copper which will control many different vegetable diseases as well.
- Other beetle controls for organic gardening include:
- Bonide's Captain Jack's Deadbug Brew and Colorado Potato Beetle Beater. These both contain spinosad which is derived from a naturally occurring soil bacterium. Spinosad works mainly on the beetle larvae.
I think any of these will help control these beetles when used according to the label directions.
Even natural or organic products can be deadly to pollinators like bees. If possible DO NOT spray when plants are in bloom. If this is not possible, spray early in the morning or later in the evening when bees are less active and ALWAYS read the label!