Explore Plants

Share

Ask Mr. Smarty Plants

Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.

Search Smarty Plants
    
 

Can't find the answer in our existing FAQs, submit a question to Mr. Smarty Plants.
Need help with plant identification, visit the plant identification page.

rate this answer
Not Yet Rated

Saturday - October 20, 2012

From: Taylor, TX
Region: Southwest
Topic: Pollinators, Pests, Trees
Title: Live oak trees buzzing in Taylor TX
Answered by: Barbara Medford

QUESTION:

Is it possible for live oak trees to make a buzzing sound? We have heard this sound under our live oak and were worried it was bees but we don't seem to see any. I also heard the buzzing under my mother's live oak tree.

ANSWER:

We do think you have bees. They are probably feeding off of honeydew which, to put it as delicately as possible, is a waste product of either scale or aphids. This was a particularly bad problem about this time last year in Central Texas, and seems to be cropping up again. The honeydew is sweet and sticky and often rains out of infested trees to mess up cars, sidewalks and your odd dog, if he doesn't keep moving. The bees are apparently attracted to that substance and may very well be nested somewhere in the thick foliage. Here is a YouTube video on bees nesting in a live oak tree.

Here is a previous Mr.Smarty Plants question on aphids in live oaks, with several additional links, all in Central Texas. Now, here is the thing - if you have bees feeding on aphid honeydew in your tree, the smart move is to leave the whole thing alone. The aphids will die, leaving eggs that can't be disturbed by pesticides. The bees will either leave or hibernate in that tree. Insecticides would be most likely to kill the predators, like ladybugs, that go after the aphids. They could also kill the bees, which are beneficials, in terms of the pollination work that they do. Either spraying that tree with water, as suggested for the aphids, or spraying with pesticide, ditto, is not going to make the bees happy. While the bees are relatively harmless beneficials, mad bees can do considerable harm. Getting up in a tree to investigate may very well require sudden movement, called, "falling," out of the tree, and the climber may be accompanied down by even more angry bees.

Our suggestion is that you wait for cold weather to clear out the infestation, and then, early in the Spring, when the aphid eggs that have overwintered start to hatch, that is the time to start with the water sprays to try to get rid of them. Read this University of California Integrated Pest Management article on Aphids for more information on their life cycle, etc.

 

More Pests Questions

Desmodium spp. (beggar's lice) in Leander TX
November 11, 2011 - Our home backs up to a greenbelt on Blockhouse Creek in Williamson County, Texas (FM 1431 and Parmer Lane). The combination of the flood and drought has left our beautiful greenbelt with an abundance...
view the full question and answer

Landscaping for slope in Kansas City
October 08, 2008 - We have a down sloping back yard and patio on the lower area. We need some water absorbing plants near the foundation and some in the front of the house, where water isn't a problem. We are allergic ...
view the full question and answer

Identification of strange tiny creature in plant water
January 14, 2010 - I have a house plant rooted in water. I has been for over a year and the plant seems healthy, I change the water often and keep it clean. I now have noticed that something is growing it. A fish type o...
view the full question and answer

Sticky material dripping from tree in Austin
July 22, 2012 - The tree in my backyard is dripping what I surmise is sap - a thick,fdrake1@ sticky substance in July. What kind of tree is it and is there anything one can do prevent this from happening? Thank you...
view the full question and answer

Secretions of fluid from crepe myrtles
June 09, 2008 - On my crepe myrtle tree I have dozens of 1/2-inch-long narrow bugs that seem to secrete tiny drops of fluid. They appear on the branches of the tree. Are these harmful to the tree? Do I need to do ...
view the full question and answer

Smarty Plants's Facebook profile Support the Wildflower Center by Donating Online or Becoming a Member today.

Mr. Smarty Plants wants you to be his Facebook friend. Click the Facebook icon to add yourself to Mr. Smarty Plants list of friends.