I had trouble with aphids for years until this spring! I've tried all the eco-friendly methods with little success. I bought "Ortho Systemic Insect Killer" (formerly Isotox) from walmart this year and it works great! My DL plants are just beautiful this year. I'm sold on the stuff!

I've found aphids are much tougher than lots of people here claim they are. If you want to stay eco-friendly and kill the aphids, try SunSpray Ultra-Fine oil or an Insecticidal Soap. Both are effective with minimum impact on the good bugs.

If you use the Ultra-Fine oil, do it on a cloudy day because it can burn the foliage. Also you need to repeat applications of anything every 5-7 days to get the newly hatched aphids. It will take 3-4 applications to eliminate them.

Brooke

After three years of being plagued by aphids, thrips and spider mites, I applied Bayer 2 in 1 Systemic for Roses and Flowers last week to my daylilies in pots. The plants look great now and no more aphids!!! As soon as this latest cold snap is over, I'm applying it to the ones planted in the ground. The insecticidal soap just wasn't doing the trick - and certainly didn't stop the thrips last year.

You can buy a bunch of lady bugs, they are aphid eating machines, even the larva. There used to be a guy on ebay that sold them, I don't think they are expensive either. You can't get more organic than that! Now if we could only get them to eat thrips! -Jessica

I use to have a bunch of ladybugs, then the Japanese ladybugs moved in and I have very few good ladybugs left.
Even when I did have a lot of ladybugs I did not notice that it helped my Crape Myrtle at all. I was loaded with aphids.
I used the Bayer last year and it kept them off the daylilies.