I planted various types of bush beans in my raised bed garden. This is a newly built raised bed with quality soil put in it. My bush beans started right up but now the leaves have brown spots. After the leaves have the spots, they desiccate and curl up. The damage started at the bottoms of the plants but now the damage is not confined to that area and is all over the plants. I have later planted beans that are coming up and they, too, are getting these brown spots.I have added some pictures to show the damage. The plants do have flowers. What is happening? Can I do anything? I do sprinkle the raised bed from the top since that is how my lawn and garden system is set up ,and I do have to be able to water when I go away.