Category Archives: trees

I’m a Leaf Baller, Insect Galler!

Written by Megan Turner – TPDDL Student Worker; Edited by Hannah Ayala – Extension Assistant Have you noticed strange bumps or swelling on your tree leaves? There could be something living in there! More than 2000 species of insects in the United States create these bumps, properly termed galls, to protect their young while they are developing. While most commonly caused by tiny wasps, they can also be caused by other insects, mites, nematodes, bacteria, and fungi. Eighty percent of galls reported in the US are found on… Read More →

Does your BadonkaCONK cause Butt Rot?

Written by Javier Garza – TPDDL Student Worker; Edited by Hannah Ayala – Extension Assistant Ganoderma rot is caused by the genus of fungi Ganoderma, a basidiomycete which has several species that cause the disease (G. zonatum, G. applanatum, G. lucidum). Ganoderma spp. have a wide range of hosts and can attack gymnosperms, woody dicots, and even some palms. However, oaks, maples, and honeylocusts are particularly susceptible to this disease. The symptoms of Ganoderma spp. may include yellowing, stunted growth, wilting, dead branches, or a high proportion of… Read More →

Rapid Decline of Oaks

Ms. Sheila McBride (TPDDL diagnostician) and Dr. David Appel, Extension Plant Pathologist with the Texas A&M AgriLife Extension Service contributed this article to address the numerous inquires that has been received this year regarding declining oak trees -KO This year, beginning in the early spring to late summer, there has been many inquiries as to why the post oaks have “suddenly” died. The most frequent symptoms have been described as a rapid appearance of chlorotic (yellow) and/or necrotic (brown and dead) leaves throughout the entire crown. The leaves often… Read More →

Oak Wilt…in the wild.

Happy Friday to all (11/20).  This last month has been one with a lot of angst and headaches.  The Texas Plant Disease Diagnostic Lab is experiencing issues due to loss of personnel – on to sickness and one to a new endeavors.  As a results, things are more hectic and phone does not get answered in a timely fashion and reports are delayed.  I do thank all for their patience with us.  On a bright note, we just started 2 new student workers (takes time to train them… Read More →

Stress, fungal pathogen(s) or both?

Mid-September 2015 The last four weeks, I got at least 3 questions regarding why junipers or pines are dying.  Often the story is that there is one or two plants that are affected in amongst a bunch of trees.  Symptoms usually begins with several branches exhibiting die-back, gradually gets worse.Some narrative states that the plant appear to die quickly one the dieback started. SO what is going on….   I remember back in 2007… The scenario = 2005/2006 hard drought years and 2007 wet spring, mild temperature thru… Read More →