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

Sunday - April 18, 2010

From: Burleson, TX
Region: Southwest
Topic: Pests, Cacti and Succulents
Title: Yucca with halticotoma valida bugs in Burleson TX
Answered by: Barbara Medford

QUESTION:

I have had Yucca plants in my yard for 10 years, but this year is the first time I have seen halticotoma valda, and there are thousands of them. How do I get rid of them? are they harmful to the plant. Thank you

ANSWER:

Most websites on yuccas would have you believe they are subject to no serious pests or diseases, but there are some. The yucca is a pretty tough plant, used to surviving in difficult environments, but these bugs are not attractive and you certainly don't want them to continue to multiply. Of the suggestions in the website referenced below, we would certainly go for the insecticidal soap first, which would have the least impact on the environment. A good hard freeze supposedly will deter them, as well, but we've probably had the hardest freezes in Texas that we will have for a long time, so if they are still with you, we would take a shot at getting rid of the little beasties. 

From a previous answer by Mr. Smarty Plants:

Here is a Connecticut Agricultural Experiment Station website on the Plant Health Problems of Yucca . The Lady Bird Johnson Wildflower Center neither recommends for nor against pesticides, but these sites have suggestions for the specific bugs in question. Always read directions carefully and follow them to the letter when applying pesticides. 

Pictures from BugGuide

 

 

More Cacti and Succulents Questions

Getting rid of yucca plants in Blanco, TX
May 12, 2009 - How does a person get rid of Yucca plants? We have four fig trees that do not bear figs, what do we need to do? We live in SE Blanco County, Texas.
view the full question and answer

Speeding up growth of Hesperaloe parviflora (red yucca)
January 12, 2012 - I have germinated Hesperaloe parviflora, Red Yucca, for our Caddo Native plant sale. I have kept in the cool greenhouse for 2 months and they are about 2 inches. A friend put one outside and they froz...
view the full question and answer

Trimming of dead foliage on trunks of yucca in California
December 21, 2008 - There is a Yucca plant in the back yard. I want to know how to get the old foliage that has died off of the trunks, it looks kind of ragged. The foliage is about three feet from the green. Can you ...
view the full question and answer

Damage to Agave in New Braunfels, TX
August 21, 2008 - In a flower box, I have an Agave on which the leaves have been damaged. It looks as if a deer rubbed his antlers on it. Is there any animal in south central Texas that would try to eat an agave?
view the full question and answer

Identification of Wood from Frying Pan Ranch Near Amarillo, TX (possibly Cholla)
April 26, 2013 - I'm doing research for a museum exhibition and have been told the "holey" piece of wood from The Frying Pan Ranch near Amarillo Texas is "chollya" but I can find no information. Can you help?
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.