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

Tuesday - May 03, 2011

From: Cedar Creek, TX
Region: Southwest
Topic: Pests, Trees
Title: Possible sawflies on loblolly pine (Pinus taeda)
Answered by: Nan Hampton

QUESTION:

My pine trees looked great a week ago, now one from top to bottom is almost without needles. It is covered with greenish caterpillars. They have several stripes down their back . Could these be saw flies? These are large loblolly pines, about 50 ft tall. We have watered the trees and spread compost yearly and trees looked well. What can I do and is it too late? We never use chemical controls and always try natural and organic methods. Thanks so much.

ANSWER:

Your description does sound like one of the pine sawflies such as Neodiprion taedae linearis (loblolly pine sawfly) or Neodiprion lecontei (redheaded red pine sawfly).  Indeed, the Texas A&M AgriLife Extension issued a Sawfly Alert on April 27, 2011. Here is an article, Pine Sawflies, from the Texas A&M AgriLife Extension and here is information from the U. S. Forest Service and from Ohio State University Extension about the life cycle, damage to trees and control measures for N. lecontei. The good news is that the U. S. Forest Service says that southern pines—this includes Pinus taeda (Loblolly pine)—can survive complete defoliation.  The April 2009 article, Pine sawfly in northeast Texas, from Texas A&M AgriLife Extension says that pines that are defoliated usually recover.  Both the U. S. Forest Service and Ohio State University Extension offer suggestions for biological and mechanical control measures as well as chemical treatments.  You may be able to use mechanical means to remove the larvae; but since your infestation sounds very heavy, you might want to consider using chemical means to control them.  The Texas A&M AgriLife Extension articles above suggest effective pesticides and "Insect and Mite Control on Woody Ornamentals and Herbaceous Perennials" from Ohio State University Extension has general information on chemical as well as other treatments.

 

More Trees Questions

Is there a recommended list for Texas Eastern Cross Timbers?
August 29, 2011 - Is there a recommended list for Texas Eastern Cross Timbers?
view the full question and answer

Retention of essential oils by Ashe Juniper wood from Austin
May 03, 2014 - I am looking for information on why local Austin Juniper/Cedar trees are so great at retaining essential oils for aromatherapy. I make pendants for necklaces out of our local fallen cedar trees and ...
view the full question and answer

Fast growing native trees for Austin
June 15, 2006 - What are your suggestions for a fast growing native tree that will do well in the clay soils of North Central Austin? I just had a 30 foot hackberry tree fall and would like to restore some shade to m...
view the full question and answer

Growths on Shumard Red Oak leaves from Katy TX
April 01, 2013 - Our beautiful Shumard Red Oak has developed lots of light green grape like growths on the leaves. Please inform us what this could be and how we should treat it?
view the full question and answer

Transplant shock in desert willow in Austin
November 09, 2011 - We planted a desert willow 5 days ago. It came in a 15-gallon pot but the tree is quite large (~10 ft) with a wide spread. We watered thoroughly during planting but have not watered since (light rai...
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