Host an Event Volunteer Join Tickets

Support the plant database you love!

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
1 rating

Thursday - June 11, 2015

From: Phoenix, AZ
Region: Southwest
Topic: Pests, Cacti and Succulents, Shrubs
Title: Will cochineal insects washed from cactus plants harm adjacent Oleander?
Answered by: Jimmy Mills

QUESTION:

Will mealybugs (cochineal insects) power washed off prickly pear cactus harm adjacent oleander plants if the white fluff gets on the oleander? My neighbor asked me to power wash my prickly pears and then became hysterical because some of the white stuff got on to her oleander. I washed it off the oleander but she's still upset.

ANSWER:


Cochineal insects and mealybugs are both described as scale insects, and the names are used interchangeably by some.  However, they are members of different families of insects.

Cochineal insects are in the family Dactylopilidae, and the best known are in the genus Dactylopius  (Dactylopius coccus) because of their production of the red dye carmine. They primarily occur on priclky pear cactus (Genus Opuntia spp)
Mealy bugs are in the family Pseudococcidae, and there are over 30 species that attack a wide variety of plants, including both Opuntia and Oleander.

Power washing your Opuntia is one method of removing the cochineal insects from the plant. The Cactus Doctor  offers other remedies.The white fluff that got on the Oleander may be of little consequence since the scale primarily grows on cactus plants. However, you may have had mealy bugs growing along with the scale, and there is an Oleander mealy bug  that could be a problem. This link to gardenweb.com  has suggestions for dealing with mealy bugs.



 

More Cacti and Succulents Questions

Tropical-looking landscape in Austin, TX
March 24, 2005 - I'd like to have a tropical-looking landscape in my front yard. What plants would you recommend for Austin, Texas? I would prefer plants that can stay outside year-round, but will take suggestions on...
view the full question and answer

Do flowers on century plants grow century plants from Huachuca City AZ
September 06, 2013 - The flowers on century plants: can they "grow" century plants?
view the full question and answer

Transplanting young Nolina texana plants
August 05, 2011 - Mr. SP, I am looking for information relating to transplanting some young Nolina texana. Esp. the best time of the year and whether to replant directly in the ground or .. Thanks,
view the full question and answer

Agave americana/Century Plant care and life cycle.
June 10, 2009 - How often do century plants bloom? Do you have info on how to care for them?
view the full question and answer

Sunny and shady lawns from Austin
April 28, 2012 - My front yard has a large bed surrounded by a mix of St. Augustine and Bermuda grass. Last summers heat killed off about 90% of the St. Augustine, which we would like to replace anyway to conserve re...
view the full question and answer

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