After many years in the same garden without issue, last year my cucumbers suddenly developed brown appearing spots on the leaves. There would be many little cucumbers but they would stop growing and also turn brown and have a mushy feel to them. This year, I was careful to ensure I rotated crops, rotated soil and added nutrients to the soil. The cucumbers started out much better with lots of flowers and many cucumbers...when suddenly the same thing started to happen again. The stems would develop these strange white patches that would look like dry spots/scratches, the leaves would from small spots and then it would just spread from there. I have sprayed copper, potassium hydroxide and hydrogen peroxide in an effort to stop the spread of whatever this is. I have managed to salvage some cucumbers but any advice would be appreciated! Thank you!