En Español

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 - 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 Ilex glabra Shamrock a female cultivar
June 02, 2008 - I have an ilex glabra "shamrock". Is it a FEMALE cultivar? I have only found information that the "compacta" and the "nigra" are females. I have a male ilex glabra and was hoping to have berrie...
view the full question and answer

What is causing leaf drop on oak in Morgan Hill CA?
June 23, 2010 - Dear Mr Smarty Plants: We have a large, young Valley Oak (about 20 yrs) which is dropping leaves even now in early summer. I have a feeling that the problem might be an invasive weed that is flourishi...
view the full question and answer

Fast-growing, tall taproot tree for El Paso
September 01, 2008 - I live in El Paso Texas and would like to know what would be a good shade tree to plant. I would like this tree to grow fast and tall. I would also like the roots to go straight down.
view the full question and answer

Mountain Laurel and Desert Willow in pots or ground in Brady, TX
May 09, 2006 - I would really appreciate your advice if a Texas Mountain Laurel (now a 1 gal. size) and a Desert Willow (now a 3 gal.) are good candidates for planting in containers and, if so, what size for each? ...
view the full question and answer

Tree for South Dakota
April 24, 2012 - Sir, I am looking for suggestions on a backyard tree, nice shade tree 60-80' height to complement a split foyer house and a flowering crab that is currently there. Low maintenance, with no seeds or c...
view the full question and answer

Support the Wildflower Center by Donating Online or Becoming a Member today.
E-NEWSLETTER | BECOME A MEMBER | DONATE NOW | MEDIA | SITEMAP | STAFF
© 2016 Lady Bird Johnson Wildflower Center