Looking at the pictures in your website, the Mexican bean beetle is...
Looking at the pictures in your website, the Mexican bean beetle is destroying my zucchini plants. I tried a hot pepper, soap, oil spray, but this does not seem to help at all. Strangely, the pest is ignoring the bean plants on another part of the garden, but are gnawing the butternut squash leaves to a lesser extent than the zucchini. What can I do?
You have squash beetle, see the following information, http://plantdiagnostics.umd.edu/level3.cfm?causeID=380
They do look a lot like Mexican bean beetle.