Q.Potato Problems
Hi. I have a problem with my potatos .Leaves are turning yellow and brown , some black. Growing in bags on patio. I would be grateful for any advice. If a disease will it spread to other veg?

Certified GKH Gardening Expert
It is very hard to tell from the photo, but it looks like a spider mite infestation paired with a bacterial infection from the wounds.
Here are some articles that will help:
https://www.gardeningknowhow.com/plant-problems/pests/insects/spider-mite-treatment.htm
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/garden-how-to/info/applying-bactericide-to-plants.htm
https://www.gardeningknowhow.com/edible/vegetables/potato/container-potatoes.htm