What's wrong with my beans?

Question: My pole beans had 'bubbly' looking leaves on them at about four feet, with leaves above & below looking healthy. A week or two later I noticed the same thing on my Greek Gigantes beans, at about the 5' level, with leaves above & below looking healthy. My purple pod bush beans do not seem to be affected. I posted a photo in a fb group I belong to and comments included aphids, red spider mites, and mosaic virus. I can find no evidence of any type of insect on the underside of the leaves...is it mosaic virus?

responder: Dennis in St. Louis Park Replied July 04, 2023, 2:48 PM EDT
response: The problem with diagnosing a virus is that several disorders look alike:  virus, aphid feeding, herbicide drift all display similar symptoms.  You can get a definitive diagnosis from the University of Minnesota Plant Disease Clinic (for a fee): https://pdc.umn.edu/  I'll make a few points.  First, I've not read that viruses appear only in a few leaves.  That would make me suspect aphids or herbicide drift.  Second, if aphids are not the culprit, they may still be involved, since viral diseases are aphid-carried.  Third, most beans are resistant to common bean viruses, but dried beans are less likely to be resistant.  I've not read specifically that Greek Gigantes is non-resistant, but open-pollinated varieties such as Greek Gigantes are much more likely to be infected than modern hybrids bred for disease resistance.  Read here: https://www.vegetables.cornell.edu/pest-management/disease-factsheets/virus-diseases-of-snap-and-dry-beans/ https://www.vegetables.cornell.edu/pest-management/disease-factsheets/disease-resistant-vegetable-varieties/disease-resistant-bean-varieties/

responder: The Question Asker Replied July 04, 2023, 3:43 PM EDT
response: Good information, thank you!   The Blue Lake pole bean was affected sooner, and over a larger area, than the Greek Gigantes...I'm leaning toward herbicide drift. My neighbors to the south spray, and my garden is near the south edge of my lot. Although I have a fence, it's 6' tall...and the beans have been affected at the 4'-5' level, which makes me wonder if it came up over the fence & had dropped a bit by the time it got to the beans.   We no longer have an extension agent, but I'm right on the border, so a two mile drive will bring me to a different county & state...I may just take some leaves in to them on Wednesday and see if I can get an answer when they see them. One other consideration is that I have three different eye conditions, so although my eyesight isn't bad, it isn't great either...in looking at the leaves themselves, they may spot insect eggs/damage that I did not.   Thank you for your help - what a surprise to get a response on a holiday!     From: ask=<personal data hidden> <ask=<personal data hidden>> on behalf of Ask Extension <<personal data hidden>> Sent: Tuesday, July 4, 2023 1:48 PM To: Karen Wanek <<personal data hidden>> Subject: Re: What's wrong with my beans? (#0108861)

responder: Dennis in St. Louis Park Replied July 04, 2023, 6:52 PM EDT
response: Check here: https://extension.umn.edu/yard-and-garden-news/noticing-herbicide-drift-your-garden  Perhaps a polite conversation with your neighbor?