Native Plants
![](../_images/smarty_plants.gif)
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.
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
Ask Mr. Smarty Plants is a free service provided by the staff and volunteers at the Lady Bird Johnson Wildflower Center.
![](../_images/mr_smarty_plants_logo_web_200w.jpg)
rate this answer
![](../_images/star_00.gif)
Tuesday - October 27, 2015
From: Center Point, TX
Region: Southwest
Topic: Diseases and Disorders, Herbs/Forbs
Title: What is the black stuff growing on my thoroughwort?
Answered by: Jimmy Mills
QUESTION:
What is the black stuff on my thoroughwort plant's leaves that is killing the plant?ANSWER:
There are several species of plants that have the common name of thouroughwort, and I suppose most of them are susceptible to this “black stuff” that is probably an infection of sooty mold.
The sooty mold is a fungus that is living on the honey dew on the leaves which is excreted by aphids and other sap-sucking insects living on the plants such as scale. As honeydew is excreted by the sucking insects, it becomes airborne and falls and coats any surface upon which it lands in the area.
I'm including three links that will tell you more about aphids, honey dew, and sooty mold.
aphids, UC IPM
Sooty mold, UC IPM
Sooty mold, USDA
More Herbs/Forbs Questions
Compatibility of mixed ground covers with St. Agustine grass
March 04, 2015 - My husband and I live in Northwest Austin. We have removed lawn from our front yard and replaced it with mulch and some trees and other plantings.
We would like to replace the lawn in our backyard ...
view the full question and answer
Restoring disturbed land in Marshall, TX.
December 04, 2014 - I have a 30 acre tract of land in Marshall, Texas. The oil company has turned 2-3 acres surrounding the rig into gravel. I would like to return the gravel area to green space. Any suggestions on gras...
view the full question and answer
Will blue eyed grass grow under black walnut trees?
January 18, 2016 - Will blue eyed grass grow under black walnut trees? I know the Siberian Iris is tolerant but the scientific names are not the same yet everything I read indicates that blue eyed grass is not in the g...
view the full question and answer
Plants for pool area in Florida
May 09, 2008 - My husband and I have a pool with 4 planters and are looking for plants that we can put into our screened in pool area. We live in Central Florida and looking for ideas of plants that are slow growin...
view the full question and answer
Annual Native Plants for Interplanting in Iowa
January 20, 2015 - I'm looking for suggestions for annuals that will flower from seed or from spring plants. I want to use them to fill in the space around newly planted coneflowers and asters that I fear will look spa...
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |