by Connie Oswald Stofko
Adult Japanese beetles are out and active, so now is the time to check to see if you have them in your garden, said John Farfaglia, extension educator with Cornell Cooperative Extension in Niagara County.
He has spotted them in his own garden. Japanese beetles occurrences can be very local, so you may not have them in your own garden.
If you have them, you’ll know. It’s easy to see the beetles and to see the damage they do. They eat many different plants.
A good overall guide on dealing with Japanese beetles is Managing the Japanese Beetle: A Homeowner’s Handbook from the U.S. Department of Agriculture. It includes information on traps, chemical pesticides and biological or organic pesticides. It also includes the best and worst plants for your garden when it comes to managing Japanese beetles.
There are many, many treatments available for Japanese beetles, Farfaglia said. Insecticides include Neem, which is organic, or Sevin, which contains carbaryl.
Don’t pick up any old insecticide; look and the label and make sure it says it will work on beetles. Local garden centers have knowledgeable staff– Ask them to help you choose the correct product.
Make sure you read and understand the directions on the label of the insecticide. Even though Neem is organic, it is toxic to bees and can contaminate water. Be very careful when using any insecticide.
But you don’t have to use insecticides, Farfaglia said. You can pick the Japanese beetles off your plants by hand and drop them into a dish of soapy water. This may be all you need to control damage to your plants.
If you have problems in your lawn with the larvae of Japanese beetles, see this information from Cornell about grubs in your lawn.