BarBalee--Great news no rust! I think you had aphids and the damage they did really shows up later in the Texas heat. I take a five gallon bucket put 1/3 cup baking soda and 2 tablespoons regular Palmolive dish soap. Take a pitcher and using about 2 quarts wash my day lilies.
I usually do this at the end of March, and whenever I have a problem.
Unfortunately this year it should of been done mid-February. I would wash affected day lilies, but be prepared that the heat on top of the fact the aphids already had lunch your foliage will not look good and they may not bloom. They may even go heat dormant. I have a few other suggestions but do not want to ramble on. May we be blessed with a cool down without severe weather.
