I’m not sure what the problem is with my Zucchini plant. As you can see from the photo, the bottom leaves are starting to get a yellow spot on them as well as a white fungus type coat on others. Should I cut off the infected leaves? Or should I pull out all the plants and start again? Could you tell me what the disease is and if it’s curable WITHOUT chemicals?
Sorry, the picture was not there but from what you describe this could be from a fungus (powdery mildew) or some type of pest. I recommend treating the plant with neem oil, as it is safe for people and will take care of both the fungus and any pests. Here is more info: https://www.gardeningknowhow.com/problems/pests/neem-oil-uses.htm