I don't know what the problem is for sure, and the only thing my gardening books mention is Mosaic virus. The leaves were big and beautiful and the plant was beginning to fruit when we had some odd weather, rainy, cold, dark for a few days and the next time I checked the squash leaves had large irregular shaped black stains on them. A few days later the blackened leaves are fading to mottled black, brown, and yellow, they are brittle on the stained areas, and they are curling at the edges. It is only a handful of leaves on each plant. It has also affected one pole bean that was growing near a squash. Flowers are still present and fruit is still developing on the affected plants. Is this Mosaic or something else? Would it help to cut the damaged leaves off or is the plant just done for? *I should add that the unstained leaves are not wilting and the fruit appears normal and normal colored. There are no holes in the leaves, even the stained ones and the stains are not in spots, but rather like a large black splatter that covers 70% or so of the leaf affected. TIA!