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

Thursday - July 07, 2011

From: Arlington, TX
Region: Southwest
Topic: Pests, Cacti and Succulents
Title: Controlling Cochineal Insects on Cholla Cactus
Answered by: Brigid & Larry Larson

QUESTION:

We have cochineal insects on a cholla cactus. Will they kill the plant? What should we do to get rid of them if water spraying them won't work?

ANSWER:

Yes, Feeding cochineals can damage the cacti, sometimes killing their host.  

You seem to be on the right track, The Cactus Doctor discusses Cochineal eradication.  Their recommendations were:
1)       A power nozzle attached at the end of your hose.
2)      If the infestation begins to get out of control, treating the areas by scrubbing them with insecticidal soap or unscented dish soap was suggested. Neem Oil was also mentioned for a natural approach.

A similar set of solutions were also recommended by the University of Arizona Extension in a publication on Cactus Diseases and in a previous Mr Smarty Plants question 

Several webpages mentioned the use of insecticides, and Wikipedia mentioned several natural preditors:   “Several natural enemies can reduce the population of the insect on its cacti hosts. Of all the predators, insects seem to be the most important group. Insects and their larvae such as pyralid moths (order Lepidoptera), which destroy the cactus, and predators such as lady bugs (Coleoptera), various Diptera (such as Syrphidae and Chamaemyiidae), lacewings (Neuroptera), and ants (Hymenoptera) have been identified, as well as numerous parasitic wasps.”

 

More Cacti and Succulents Questions

Non-native jade plant from Pauline SC
August 24, 2012 - Do jade plants grow in South Carolina; if, so where?
view the full question and answer

Foundation plants for Albuquerque.
July 01, 2012 - Hello, I live in Albuquerque. I am looking for some native/xeric low water usage plants for foundation plants for my home. They will be foundation plants for a two story home that has a large ponde...
view the full question and answer

Trimming freeze-damaged Agave Americana in Alvarado TX
April 08, 2010 - What is the best way to trim Agave Americana cactus? The freeze this winter when it snowed has caused the leaves to die towards the bottom of the plant.
view the full question and answer

Survival of yucca plant mowed down in Oklahoma
April 15, 2009 - I have a yucca plant that came from a very old plant of my late father, and had transplanted it 6 years ago and it came back every year and bloomed. This morning I went outside and noticed my husband...
view the full question and answer

Plants for hanging flower boxes from Austin
July 27, 2013 - I have two long flower boxes 17" x 15" x 25 feet long one on the north side of the apt and one on the south made of metal suspended about four feet from the ground. One will get the morning sun and ...
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
© 2014 Lady Bird Johnson Wildflower Center