Daylilies forum: Aphids in daylilies

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Name: Larry
Enterprise, Al. 36330 (Zone 8b)
Composter Garden Photography Million Pollinator Garden Challenge Garden Ideas: Master Level Plant Identifier Celebrating Gardening: 2015
Region: Alabama
Mar 15, 2017 6:52 PM CST
Earlier in the year I had a problem with an aphid invasion in my daylilies. I had to spray them two or maybe some three times to get them under control. I just used dish detergent and it seemed to do the job. Then dozens of Ladybugs moved into my garden and took care of the problem. I wonder if I should have waited a while longer before using the soap? But, the invasion was so great that I cut back the daylilies to the ground almost to get down into the foliage where I could really spray them well.
Now I read a lot of stuff, but I just happened to be on the AHS site and was just surfing through some of the basic care and found that daylily aphids may be a little tougher to get rid of than "normal" aphids. I had never noticed or read that before, I just assumed one type of aphid was pretty much like another when it came to killing them. The info went on to state that often an insecticide with some systemic action is needed. I just post this because I have seem several other people reporting huge aphid invasions on their daylilies this spring. So if soapy water is not getting the job done, and if the ladybugs don't show up you might need an insecticide with systemic action, according to the AHS.
Name: Virginia Harmon
Woodside, CA 94062 (Zone 8b)
Pollen Dauber
Mar 15, 2017 7:05 PM CST
Beauveria bassiana Is a fungi that has proven successful under the right conditions. It requires relatively high humidity to be effective among dense foliage such as daylily clumps. It can only affect the insects that it comes in contact with. As with all aphid treatments, repeat applications are necessary as aphids are capable of reproducing very soon after birth and regenerate fiercely.
Member of AHS
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Mar 15, 2017 8:48 PM CST
Larry, I think why they say that is because you can't get at all of them down in the leaf bases with a contact spray like soaps, so some will always survive to keep reproducing. A systemic would get the ones a contact can't reach. The daylily aphid is not the only aphid species that can affect daylilies.
Name: Sue Petruske
Wisconsin (Zone 5a)
Mar 15, 2017 10:44 PM CST
Sorry for your aphid invasion. Reading this causes me to be careful of what I wish for. I often read here of the early daylily blooms across the country coming in the warmer climates and wish our Wisconsin weather offered a longer season. But I guess your longer season brings more crosses to bear. I am thankful for our cold winters as they seem to give us daylilies with no rust issues. Plus it gives me a rest from the garden work. Although I'm always more than ready to get going in the spring, by the time October is upon us, I'm happy to be putting everything to bed for the winter.

I DO wish we had lady bugs though. I remember seeing them when I was a child but they are no longer here. I think the Asian beetles chased them out completely. And it seems the Japanese beetles get WORSE every year.
[Last edited by petruske - Mar 15, 2017 10:47 PM (+)]
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Name: Stan
Florida Panhandle (Defuniak Sp (Zone 8b)
Region: Florida Region: Gulf Coast Enjoys or suffers hot summers Daylilies Lilies Keeps Horses
Dog Lover Garden Photography Butterflies Hummingbirder Birds Bee Lover
Mar 16, 2017 4:38 AM CST
Larry, being I'm just a bit south of you, I too had an infestation of aphids a few weeks ago. I procrastinated and procrastinated spraying. Just as you mentioned, the lady bugs showed up in droves. Almost overnight no more Aphids. I haven't not noticed any real damage, as all of the fans have really put on the growth with our mild temps. And then, the latest round of 20° weather showed up.

My procrastination did rear its ugly head though in form of RUST! Spray, systemic, spray again...that was me last weekend...
(Georgia Native in Florida)
Name: Pat Strong
Stone Mountain (Zone 8a)
Region: Georgia Dragonflies Ponds Cut Flowers Dahlias Birds
Orchids Butterflies Garden Photography Houseplants Hummingbirder Daylilies
Mar 16, 2017 5:52 AM CST
I hope the 20 degree weather didn't do any damage to your plants. I covered a few of the ones that were newly planted.
Name: Stan
Florida Panhandle (Defuniak Sp (Zone 8b)
Region: Florida Region: Gulf Coast Enjoys or suffers hot summers Daylilies Lilies Keeps Horses
Dog Lover Garden Photography Butterflies Hummingbirder Birds Bee Lover
Mar 16, 2017 5:56 AM CST
I agree and same to you Pat. I haven't covered any of mine and had just recently put in a group of fans I got from Fred. The fans were very healthy so I think they will survive, stunted perhaps but should recover.
(Georgia Native in Florida)

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