What's wrong with my bush beans?

[Sarah McKergow]

Some of the leaves on my bush beans are yellow and crisp. No bugs on them, I have seen grasshoppers in the garden but not on these guys. Any ideas and remedies?

 

[Chuck]

Some of the leaves on my bush beans are yellow and crisp. No bugs on them, I have seen grasshoppers in the garden but not on these guys. Any ideas and remedies?

Looks a lot like Mexican Bean Beetle damage

 

[Sarah McKergow]

Looks a lot like Mexican Bean Beetle damage

I haven't seen any of them in the garden!