En EspaŅol

Q. Who is Mr. Smarty Plants?

A: There are those who suspect Wildflower Center volunteers are the culpable and capable culprits. Yet, others think staff members play some, albeit small, role. You can torture us with your plant questions, but we will never reveal the Green Guru's secret identity.

Help us grow by giving to the Plant Database Fund or by becoming a member

Did you know you can access the Native Plant Information Network with your web-enabled smartphone?

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
    
 
See a list of all Smarty Plants questions
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

Tuesday - May 27, 2014

From: Austin, TX
Region: Southwest
Topic: Pests
Title: Infestation of shiny red and blue/black beetles
Answered by: Nan Hampton and Valerie Bugh

QUESTION:

I have an infestation of 1 cm long shiny red and blue/black beetles. They have red heads with black eyes and antenna, 2 (?) red spots on their sides, and a bluish black body. Before I kill them with insecticidal soap, I want to make sure that they are not beneficial. Thank you.

ANSWER:

Mr Smarty Plants consulted with an entomologist, Valerie Bugh, to give you the best answer to your potential pest problem.  She said:

"Without knowing the host plant, location, or seeing a photo, this could be a description of a number of true bugs or beetles. Since the term "infestation" usually means a large number of individuals, there is an excellent chance that the insects are NOT predatory but herbivorous. One exception: some predatory stink bugs, which can be black/red, prefer to remain in groups. If the plant is a personal favorite and is declining in health, then it would make a gardener feel better to kill off the insects."

However, knowing that you live in the Central Texas area she thought that this might be Asphaera lustrans, a flea beetle that likes salvias, among other things. They may sometimes be rather numerous but never seem to do much damage.  Here is another photo and information from Nature Search.

 

More Pests Questions

White specks on unknown houseplant from Ridgeway SC
June 20, 2013 - I have an unknown houseplant that seems to have some sort of pest or disease on it. It has white snowy specks atop its leaf. I bought this purple fuzzy leafed houseplant from Walmart in Winnsboro, SC ...
view the full question and answer

Eliminating straggler daisy from St. Augustine grass in Hochheim TX
May 14, 2010 - I have straggler daisy in my St. Augustine grass. What herbicides work well on straggler daisy and won't ding up the grass too bad?
view the full question and answer

Tip Dieback on Lonicera sempervirens
August 14, 2013 - I have a Lonicera sempervirens (coral honeysuckle) vine in Virginia which does well early in the season, but then around July, the very tips of its shoots (just the last 1-2 inches) wither, turn black...
view the full question and answer

Cenizos browning in Houston
October 01, 2011 - After this horrible drought, I am committed to xeriscaping with native Texas plants. The few hibiscus that survived have been transplanted into pots and are thriving. I bid the tiny boxwoods a fond fa...
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

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.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2015 Lady Bird Johnson Wildflower Center