For the person who put the beetles in a jar asking for identification. These are Japanese Beetles.
An easy way to battle them without pesticides – which we don’t use in our community garden – is to get a pail of soapy water and put it directly under the plant being bothered. If you tap the leaf, the beetle drops into the water and drowns.
If you do this early in the day when the beetles are the least active, you will greatly reduce the number of beetles in short order.