Sorry if this has already been addressed, but I can't locate any old discussion or information.
Is it necessary/desirable to seal the ends of cut canes when pruning hybrid tea roses?
I recently did a bit of late pruning of some neglected roses. It was then suggested to me that I should have sealed the cut ends with glue, to prevent cane borers from getting in. (I didn't.)
Thanks for any information and suggestions, I'm not much of a rose person and am happy to get advice.

I think the advice is to seal any cut cane the size of a pencil or larger.

I've never sealed the ends of cut canes, but I've never seen evidence of cane borers in any of my roses. If you've seen any evidence of borers, use the glue. If not, don't bother. It seems like a lot of work to guard against something that might never happen.

It can be tedious if you have borers and a lot of rose canes to seal, but I try to finish my pruning with this chore. If I don't I will see cane borers by June. If a cane borer makes its way all the way down into the bud union, I've been told it can kill the rose bush.

Wood glue, Elmer's glue, nail polish have all equally worked well for me. Back in the day, I've heard it was common for housewives to complete rose pruning by sealing the canes with lipstick!

Sealing often is no longer done since it's labor intensive and doesn't prevent a new rose developing later on the cane. Then the recommendation is to prune below the invading borer at pruning time.

You have to use something that isn't water -soluble,so nail polish or wax are better. Elmer's glue will wash off in rain eventually. I carry a candle around with me and rub it onto cuts that are the size of a pencil or more.

What a great idea!