Rent Shop Volunteer Join

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

Please forgive us, but Mr. Smarty Plants has been overwhelmed by a flood of mail and must take a break for awhile to catch up. We hope to be accepting new questions again soon. Thank you!

Need help with plant identification, visit the plant identification page.

 
rate this answer
2 ratings

Saturday - May 10, 2008

From: Krum, TX
Region: Southwest
Topic: Pests
Title: Identification of red and black insects on Yucca
Answered by: Nan Hampton

QUESTION:

I have little red and black insects on my soft leaf yucca and I don't know what they are or how to get rid of them. They make the leaves rusty looking. Do you have any idea what they are or how I can get rid of them (preferably in an organic way).

ANSWER:

Mr. Smarty Plants thinks the bugs on your Yucca arkansana (softleaf or Arkansas yucca) are probably Halticotoma valida (yucca plant bug). Ohio State University in their Plant Bugs on Perennials and Landscape Shrubs has suggestions for various ways to control these pests, including eco-friendly ways. The Connecticut Agricultural Experiement Station also has a list of insects (including H. valida) which affect Yucca spp. and means to control them, but their control methods are heavy on chemicals.

 

From the Image Gallery


Arkansas yucca
Yucca arkansana

More Pests Questions

Something dripping from red oak in Austin
July 30, 2012 - There is a large red oak outside my apartment. The leaves are shiny and covered with what appears to be oil. The ground underneath is coated with this also. When I parked under the tree my car beca...
view the full question and answer

Watering oaks in Houston, TX.
June 07, 2011 - Our yard (Real County, TX.) has many oak trees. We never water these trees, but I wonder if you recommend watering during this extreme drought. The trees look very stressed and are covered in ball m...
view the full question and answer

Leaves wrinkling on Tecoma stans from San Antonio TX
August 16, 2013 - My two year old esperanza (planted in the ground) froze back last winter, came back from the roots & has been doing well all summer. Recently one branch has leaves that are nice & green but very wrin...
view the full question and answer

Insects on yucca from Ft. Worth TX
April 05, 2012 - I have a plant labeled Yucca Soft Leaf recurvifolia that I planted about 5 years ago,& was beautiful until last summer when it became infested with thousands of fast, tiny, dark insects. I sprayed wit...
view the full question and answer

Oaks emitting substance in Lakeway TX
August 14, 2012 - We have two large oak trees in our yard that are emitting a clear, very sticky, non-fragrant substance. The leaves are beginning to be covered as is our deck. Bees are now attracted and I am worried ...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.