I found some mexican bean beetle larvae on my beans the other day!
They’re heartbreaking when they get out of hand, but I’m sure this is in time for the rest of you to check your plants. Apparently the most effective management is hand-picking, but there are other organic solutions as well. I’ll be out there picking yellow squishy larvae myself periodically. (yuck.)
Some info and pictures (and there’s plenty more on other websites): http://www.organicgardeninfo.com/mexican-bean-beetle.html.
Wagon Hill Farm Community Garden 