Native Plants
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.
rate this answer
Friday - September 20, 2013
From: Austin, TX
Region: Southwest
Topic: Diseases and Disorders, Pests
Title: Green cyst-like growths on Texas persimmon leaves
Answered by: Nan Hampton
QUESTION:
We have a mature Texas persimmon. We just noticed some green cyst-like growths on the tops of some of the leaves. The undersides of those leaves have black spots where the growths are. They looks like they could be eggs, but we are puzzled by this. Is this something to be concerned about, and should we treat it? Thanks.ANSWER:
If you will look at the photo on the Diospyros texana (Texas persimmon) species page, you will see that some of the leaves on the tree in that photo have cysts similar to those you describe. These are called leaf galls. One possibility for these galls is Aceria theospyri [synonym = Eriophyes theospyri] (Persimmon Leaf Blister Gall). Here is a description from the Florida Bureau of Entomology. Persimmon leaf blister gall isn't caused by an insect, but by a mite—a relative of ticks. Galls are growths by the plant in reaction to the insect or mite laying an egg in its tissues or to an insect or mite feeding on the plant's tissues. This article (Gall-Making Insects and Mites) from Texas A&M AgriLife Extension and this one (Insect and Gall Mites) from University of Minnesota Extension Service both say that galls are not usually deleterious to the plant. They may result in early leaf fall, but, in general are not especially harmful to the plant. They usually don't warrant any control measures such as chemical spraying. Indeed, spraying them after the galls have formed is not effective since either the damage is done and the insect larvae is encased within the gall or the feeding process has been completed.
In answer to your specific questions, you shouldn't be especially concerned about the galls and treating them would most likely be ineffective.
From the Image Gallery
More Pests Questions
Shade Tolerant Groundcover for Texas
July 13, 2016 - I live in Atascosa county in Pleasanton Texas, I have an abundance of Live Oak and Ash trees shading my property and need a groundcover for my backyard which is nothing but sand and where I have dogs ...
view the full question and answer
Caterpillars on Milkweed in MA
January 23, 2016 - I have found every year a black/red caterpillars on my milkweed. They eat everything! I have never been able to find out what they are or how to get rid of them.
view the full question and answer
Can tulip tree sap be used to make syrup in Bunker Hill IN?
July 10, 2009 - I was just wondering if tulip tree sap could be used to make syrup. I saw the sticky stuff on the leaves and decided to taste test it and it was very sweet, unfortunately I later found out that I was ...
view the full question and answer
Eliminating straggler daisy from St. Augustine grass in Hochheim TX
May 14, 2010 - I have straggler daisy in my St. Augustine grass. What herbicides work well on straggler daisy and won't ding up the grass too bad?
view the full question and answer
Snails in my flower beds
May 06, 2009 - I live in Kingwood, Texas (north of Houston). I have been inundated with snails in my flower beds in my front & backyard. I really didn't want to use a pesticide, but they were eating all of my flo...
view the full question and answer
Support the Wildflower Center by Donating Online or Becoming a Member today. |