sorry i thought the kw were a hybrid, obviously i am wrong. as to the trap crop, i do NOT need a trap crop! the kw brought the jb TO the garden! well it seems that way because i seldom have jb problems in the garden. the 4 beans are all in the same area, it is not the soil. my garden is well established with rich soil. an explaination will help explain the differences in size. the old favorite variety (ofv) i grew for years was planted at the same time next to the kw. the ofv seeds are old (from 2000 or 2001) so germination was way behind the kw seeds which were new seed from johnny's this year. that ofv was just emerging from the soil when the kw had been up for 10-12 days and then the ofv grew slower than the kw. as to the 2 new polish varieties, they were planted 3 1/2 weeks later than those other 2. they came up ok, not slow like the ofv but quick like kw, but they are smaller due to a late start. this is why the kw are so much taller on the trellis, the other 3 are catching up, it is not the soil. and yes alfie, perhaps you are correct. maybe the jb are going to the kw because it is the highest of the 4 pole beans but maybe kw tastes better to them? at any rate, i noticed yesterday the damage is not progressing as fast as it had been. i will still compare how the kw produce and taste. i have lot of kw seeds left and if kw does ok despite this i'll grow it again. thanks for your help, tom

I am not ignoring your question, I just don't have an answer for you...i usually don't get too concerned with a few yellow leaves as seems with beans that often happens. I had a serious aphid attack on some of my bean plants and I gave it a soapy bath and the leaves look pitiful but it's still growing so I am not being too fussy about it... Here is a link that might be useful: Link

That looks like some kind of bug damage to me. I just Google'd "thrips damage" and many of the pictures look like the one you've posted here. I would wait for someone else to confirm, though, as I've no experience with thrips.

Let me share my kentucky wonder pole bean story.... Most of my pole beans didn't make the rabbits picking them off, I have three surviving plants, mixed in with bush beans in the same garden box....which was a last minute decision to fill the box-they are doing great. a couple of weeks ago i spread a little manure mixture around the plants and watered heavily, but have slowed down the last two weeks, since everything looks great-beans are growing wonderfully. 4 days ago, the neighbor's dog had their muzzle in my green beans for a minute or two. then the dog took off, the dog came back and had their head into the beans once more. that's when i ran out the door and let the neighbor's know that dogs carry pathogens to unborn babies and the dog is no longer welcomed. today i went to water the plants, and the exact spot where the dog was nosing, is all yellow and brown-the leaves feel like sandpaper. I know it's the dog's fault-it has to be. the saliva i don't believe was washed off, the dog is female, so i don't believe it's dog urine. this would match up with the other comments about the leaves looking yellow brown more towards the bottom of the plant. I just wanted to post, to make sure I wasnt going to get a disease from eating the beans from the plant. also, the kentucky wonder pole beans seem to be the only plant effected. is this dog's favorite food?