Have you used the beetle traps that dumps them into a trash bag. We have many traps placed around our research farm and our crops are in great shape. Contact out IPM expert Dr. Jamie Pinero (573) 681-5522 Pineroj@lincolnu.edu. But, often his technician Austin Dudenhoeffer is easier to reach at austen.dudenhoeffer657@my.lincolnu.edu. I have Austen's phone number but it's his cell and not sure I permission to give it out. But, if you email him I am sure Austen can send you in the right direction to get some good traps. He can tell you which ones they use and how to put them up so that you don't waste money on brands that do not work