I have seen spotted cucumber beetles around my organic garden and have been able to eliminate them by hand picking them off as I see them. But they just keep coming back. Is there any effective organic spray I can use which won't poison my plants? I have some really nice tomatoes and squash growing too and I'm afraid if I don't treat, these beetles will start eating everything.
We have several organic products that can be used effectively for cucumber beetles. One of the most common products used over the years has been INSECTICIDAL SOAP. It will work on them but it doesn't last and it's not the strongest option. At this time we recommend either MULTI PURPOSE INSECT KILLER or the GARDEN DEFENSE WITH NEEM. Both are extremely effective on any type of beetle and they seem to be active for a few days which helps reduce the amount of times you'll need to spray.
What most people don't realize is that 90% or more of their cucumber beetle problem is that once they get on your property, they tend to stay there breeding in the soil. If you want to get rid of them once and for all, you should treat the ground directly under and around your garden. This will help reduce effective egg laying and cucumber beetle larvae survival so in the end, you'll be able to control them before they ever become a problem. This is a much smarter approach when it comes to treating this pest.