Is this some insect, nutritional defect, or fungus? Or, some alien hieroglyphic that I need to interpret? Whatever, it seems to be all over my garden. Cucumber 1 (Bushy):

Cucumber 2 (A&C Pickling):

Cucumber 3 (Japanese Climbing):

Japanese Melon:

Patty Pan Squash:

Yellow and Green Bean:

Even the Nasturtium!

These plants are in different soils in different areas, albeit a few feet to three yards away from one another. I pulled out the bean plant as it just looked awful. I gave plant food and more watering for the cucumbers and melon and the newer leaves look better, and I cut off a ton of squash leaves, most of which were covered in white spotty mold. Your advice is welcome! Thanks for reading. – Kaye