I have a couple of questions. Towards the end of the season my blackberries started looking a little odd. The berries were irregular. Each berry would be normal and plump as well as very small berries contained in each berry overall. Yet, on the same bush there would be normal size berries. This didn't occur until the end of the season and seemed to be on the ones that were exposed to the sun. Those under the leaves were of normal size. The second question is I've noticed quite a few bugs that resemble stink bugs on the plants and on the ground at the base of the plants. They don't seem to be causing any damage but I wonder if they could be a problem. I haven't sprayed with any pesticides or chemical fertilizers at all this season.
It sounds like you have insect damage. Consider using an organic type of insecticide to help control that. Kaolin Clay is a good choice to use on berry bushes.
Also you may find this article helpful:
https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm
Why are my blackberries sour? The plant itself is beautiful and the blackberries look fabulous, but when you eat them, UGH! They're sour. I've had the plant for about 5 years and it's the same every year. Not a sweet one yet!
My guess would be that you may simply be picking them too early. Most people tend to pick blackberries when they are a nice glossy, dark color when in fact you should wait for them to dull in color before harvesting.
I have had my first blackberries of the season and I have noticed on the bush that my berries are ready, parts of the berry are a kind of yellow or tan color on part of the berry. Are they diseased or just lacking nutrients?
this may answer your question:
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm
Can you plant blackberry bushes in the fall? I did not own the land this spring that I could plant them on; however, over the summer I was able to purchase it. I read your article and it said to plant as early in the spring as possible, so I am just asking.
Yes, you can usually plant them in fall as long as the soil in your area is still workable; otherwise, early spring would be preferable. Here is an article that you may find helpful: https://www.gardeningknowhow.com/edible/fruits/blackberries/growing-blackberry-bushes.htm
Blackberries have appeared in a corner of my raspberry patch for the last few years. The bushes are tall and healthy looking but don't produce many berries. Can I do something to make them produce? Or could they harm the raspberries?
this should help:
https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm
Can you transfer a blackberry bush? It's on a fence with about half shade that seems to be growing ok, but I'm a big fan of them and I want them to grow bigger and produce more. So can I move them into full sun without them dying?
Yes, you can move them and they do fine in full sun. Spring is the very best time to move them, followed closely by early fall.
This article will help you to avoid transplant shock, which is what kills any plant that is not moved carefully:
https://www.gardeningknowhow.com/plant-problems/environmental/learn-how-to-avoid-and-repair-transplant-shock-in-plants.htm
We have 57 acres. Most have blackberries and raspberries growing wild. Most raspberries are small. The blackberries were great, but this year there were few berries. We also have lots of briars but no berries. Why?
There is a virus that can cause blackberries and raspberries to become sterile. Wild brambles are particularly at risk. This article has more information: https://www.gardeningknowhow.com/edible/fruits/blackberries/blackberries-not-fruiting.htm