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
Not Yet Rated

Tuesday - June 02, 2009

From: Marble Falls, TX
Region: Southwest
Topic: Diseases and Disorders
Title: What to do about powdery mildew on Pavonia lasiopetala?
Answered by: Jimmy Mills

QUESTION:

My Pavonia lasiopetala seems to have gotten mildew this spring. I was hoping that warm weather would get rid of it. Instead it has spread to most of the plants which are located in widely separated beds. Should I pull it all out? Or will it recover? I can't see that it has affected any of the other plants in the same beds.

ANSWER:

Pavonia lasiopetala (Texas swampmallow) is a popular garden accent plant throughout Texas, even though it originates on dry, rocky woods or banks of South, Central or West Texas. Like many other species in the mallow family, it is very susceptible to powdery mildew.  While pavonias leaves are sometimes greatly disfigured, the plant is seldom seriously injured by an infestation of mildew.  Before pulling it out, I would suggest trying to control the mildew. I've listed some websites that explain mildew, its causes and treatments, including both organic and chemical remedies.

Golden Harvest Organics

Lawncare

Washington State University Extension

Alabama Cooperative Extension System

Another source of information is the Burnet County Extension Office.


Pavonia lasiopetala

Pavonia lasiopetala

 

 


 

 

 

More Diseases and Disorders Questions

Problems with Cedar Elm in Austin, TX.
August 04, 2012 - Our Cedar Elm has yellowing very dry leaves and something is eating the topmost leaves leaving holes and obviously chewed off leaf segments. Could this be two different things? Aphids and bacteria or ...
view the full question and answer

Willow Tree with Bark and Leaves Falling Off in Missouri
October 01, 2015 - My willow tree is suddenly lost leaves on 1/2 of the tree. The tree has 2 major trunks and the leaves that have fallen (all off within about 3 weeks) are on one trunk but the bark is impacted on both ...
view the full question and answer

Drought-resistant and grub-resistant grass for Smithville TX
October 02, 2012 - I want a drought resistant grass for a sunny area that is also resistant to grubs. I have lots of grubs but want a healthy soil of good microbes. Any ideas? Zoysia, Buffalo? I noticed that Tech Turf r...
view the full question and answer

Webs on tree trunk, probably bark lice
August 19, 2009 - webs on tree trunk and creeping up. See no spiders or worms. what could be. very fine, thick web
view the full question and answer

Need some help with a Plumbago plant in Mission, TX.
August 06, 2010 - Hello..I live in south South Texas and have a plumbago. It gets about 4 to 5 hours of direct sun and lately some of the branches and leaves turn bright green almost yellow. Am I over watering or is ...
view the full question and answer

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