A type of insect is eating my daylilies. There are literally swarms of them inhabiting my daylily plants. They ate the leaves and left jagged edges all over them; the most severely eaten plants turned brown and shriveled down to the ground.
I looked up this insect in my gardening book but I could not find it mentioned as a threat to daylilies. It looks like a small beetle, with two yellow stripes running down the length of its body. I tried pyrethrine for a week and it did not work; I tried Spectricide and diatomaceous earth and they also failed. I was so desperate I turned to Ortho's Bug be Gone today and sprayed it on the daylilies, at the recommendation of our local nursery.
I felt so guilty about this because Bug be Gone contains diazinon which is toxic to everything on the planet. What can I use to solve this problem, while minimizing the effect on other insects and birds in my backyard?
Jeff