The fungicides chlorothalonil, copper, mancozeb and maneb may be used for septoria leaf spot and early blight on tomatoes. Remember fungicides do not cure infected plant parts but may slow spread of disease. Read and follow the label directions especially the interval between spraying and harvest. Holes in hosta leaves are being reported by some gardeners. The most likely culprits are slugs.
Slugs are mollusks and related to snails, clams and squid.
They look like a snail without a shell. The spotted garden slug is 3 inches long and gray with black spots. Slugs need a moist environment to live. They eat dead and live plant material. Slugs are particularly fond of thin-leafed hostas.