What’s wrong with my daylilies?
Disease ProblemsDaylilies are susceptible to two potentially serious diseases, which are called leaf streak and daylily rust and are caused by fungal organisms.
As its name suggests, leaf streak results in long, yellow streaks on leaves, starting at leaf tips and with leaves eventually turning brown and dying.
What is eating my daylily leaves?
The lily leaf beetle larvae, or grubs, cause the most damage. Hundreds of larvae may hatch at one time, and they begin eating immediately. Though the leaves are their preferred food, they will also devour buds, flowers and stems.
How can daylilies be prevented?
To avoid spread of this disease, try to irrigate the soil rather than the foliage, and avoid working with plants when they are wet. Also, try to keep plants thinned to provide better air movement. There are fungicide options for daylily streak, if you choose that route.
How do I get rid of aphids on daylilies?
Aphids Treatmentthe plant with a mild solution of water and a few drops of dishwashing soap such as Dawn. Stir together 1 quart of water, 1 tsp of liquid dish soap and a pinch of cayenne pepper. Do not dilute before spraying on plants.