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Green news from the UC Division of Agriculture and Natural Resources
by Byerly Woodward
on May 14, 2014 at 2:42 PM
I released some lady bugs I bought at Merced nursery three years ago onto my aphid-laden artemisia plant. The beetle not only stayed but they have been there every year since. Right now there are several stages of life in evidence, most munching on the aphids.  
Maybe these are not typical ladybugs?
by mp
on January 9, 2015 at 9:23 PM
If I had an indoor rosebush struggling with aphids would it work to put a glass over the plant to keep the beetles inside and then release them after a few days?
by Jeanine Cantrell
on June 5, 2017 at 8:52 AM
I recently treated my garden with a chemical spray to get rid of aphids.Today a friend surprised me with a container of live ladybugs.What can I do to safely use them without the already applied spray killing them? Do I rinse the plants first and wait?
by Fred DelRusso
on July 8, 2017 at 6:52 AM
I get lady bugs every year a lot of them stick around. They work great and it's a fun event if you hand your helper the container right after you open it. I will never do anything other they work and solve the problem fast.
by Chelsea
on April 5, 2018 at 6:23 PM
Every year in the past that I've tried ladybugs, they've always flown away. Last year we used ladybugs in a community garden, and not only did they stay on a bed of pea plants, but they started reproducing like crazy, eggs and larvae were everywhere. On top of that, wasps, flies, and a different species of grey ladybug were attracted, and the whole thing became a literal buzzing hive of biodiversity. It was nuts.
by Mary
on May 6, 2018 at 3:05 AM
I have a Linden tree in front of my house that gets aphids each summer. So bad that our cars are covered with their sticky residue every day. We have had days where the windows get stuck and won't go down. Will ladybugs work in a tree? Its a city tree and we cant have it cut down.
by Hillary Jessup
on June 27, 2018 at 7:13 PM
Love lady bugs🐞
by Roger woodard
on October 14, 2018 at 7:35 AM
I’m infested with wooly aphids. I’ve been using Bauer tree and shrub pesticide(which is supposed to last 12 months, and didn’t). Will ladybugs eat all of them? I have many trees around my home, the aphids get on everything. Plants, mostly trees, and you know what happens when the y start sucking the sap out of leaves. My neighborhood is badly infested. What can I do for next year? Desperate, thank you
Reply by Pamela Kan-Rice
on October 22, 2018 at 2:44 PM
Roger, you have our sympathies. "No, ladybugs (lady beetles) do not typically eat 100% of the aphids on plants," says Karey Windbiel of UC Integrated Pest Managment." It’s hard to say what type of aphid you have without knowing what trees or plants they are attacking. If they aphids are woolly, it could be the hackberry woolly aphid which you can find out more about at . Contact your local UC Master Gardener for help in determining what aphid pest you have and finding the most appropriate and effective solutions."
by Tonya
on October 19, 2018 at 4:38 PM
If I already sprayed my plants with a vinegar and water mixture to kill aphids, how long do I have to wait to release my ladybugs
Reply by Pamela Kan-Rice
on October 22, 2018 at 2:48 PM
Hi Tonya, Karey Windbiel, UC Integrated Pest Management advisor, says "Vinegar is not a treatment recommended by UC IPM for aphid control, so we have no information on how vinegar will affect aphids or the ladybugs (lady beetles) who consume them. Since it is still warm in many areas of California and aphids are still founds on some plants, you could release lady beetles now. However, as we get closer to the winter months, the lady beetles will start to seek overwintering sites and may not stick around to eat the aphids. Read more about aphids and their control at or contact your local UC Master Gardener for help in determining what aphid pest you have and finding the most appropriate and effective solutions."
by Jena
on May 2, 2019 at 8:32 PM
What’s the best temperature to begin releasing these beauteous aphid lovers?
by Ann
on June 26, 2019 at 4:20 PM
I dont know if its infested in the whole area bit I know our tree out front has them. I was too excite and scared so i released the ladybugs in the back yard porch instead. Will the lady bugs be able to make their way around? Or should I go buy some more?
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