A picture is worth more than a thousand words. Post a photo or something. It's hard to know what you meant by 'pale', is it yellow-ish green? Or a washed out kinda green?

If the leaves are showing yellowish tint with dark green veins, they have iron chlorosis caused by iron deficiency.

Best to post a picture so the experts on here can see the problem.

If it's a resent problem don't rule out a herbicide drift.

What type of raspberries? Primocane fruiting or floricane fruiting? If primocane fruiting, do you mow to the ground every season or do you stake them? Do you fertilize? When did the symptoms start? Just this year? Were they healthy last year? I agree with Alec, a picture would be a huge help.

Sorry, don't have a photo.

Leaves are yellowish green.

They are the type of raspberries that fruit twice a season. Don't know the names.

I usually cut them back to 2 to 3 feet tall after the season.

Is it better to cut them to the ground after the season for better health?

Your raspberries are known as primocane fruiting raspberries. This means that the current years growth (primocanes) will produce one crop in the fall and if you let them over winter will produce another crop in spring/early summer the next year. This, you already know :)

However, some people only let them fruit in the fall (a smaller but superior crop) and cut them to the ground after the harvest. This way they dont have to be staked or supported over the winter. Also it allows for better airflow between plants because you only are ever growing primocanes as there are no floricanes (2nd year canes). You arent currently growing them wrong, its just two different approaches.

So, are all of your canes showing signs of yellowing leaves or just the floricanes? Floricanes lose vigor as they ripen their fruit and die soon afterwards. If all of your raspberries are getting yellow leaves, are they uniformly yellow? Yellow with green veins? Yellow blotches?

I would guess your issue is lack of or too much water. Lack of nutrients or a disease issue. Without a picture or more info its impossible to say.

Thanks for the info Paul. I saw a new plant about a foot tall that shot up from the old plant and it looked healthy. I will try to prune them way back this winter.

I usually just let them go a is in the winter and prune in the spring, and then just a little. I figured since I was late pruning I didn't want to cut back on the plant and not get as much berries.

I gave them some fertilizer and will see what happens. I didn't think raspberries were so delicate and required as much work.

Make sure you remove any 2nd year canes that have already fruited, dead canes shade out new growth and can carry diseases.

OK, I've been waiting until the following spring to do it when they are dead.

Well it sounds like you are doing everything right then. May just need to give them some fertilizer on a more regular basis. If at some point you can post a pic I may be able to give more specific advice.