Category Archives: PATHOGEN

Ento-MOUSE-sporium

Written by Kendall Grier – TPDDL Student Worker; Edited by Hannah Ayala – Extension Assistant Disease is everywhere! As plant diagnosticians, we are constantly reminded of this everywhere we go. One of these reminders is daily as we walk into the lab for work. When you walk into the Centeq building (the building where the Texas Plant Disease Diagnostic Lab is located) you are greeted by some spotted Indian Hawthorns. At first glance they look very pretty, almost as if the color change is caused by the changing… 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 →

New treatment for the management of Cotton Root Rot on winegrapes

Dr. David Appel, Extension Plant Pathologist with the Texas A&M AgriLife Extension Service contributed this article that describes a new treatment for one of the most devastating diseases of Texas winegrapes. This was research conducted by Dr. Appel and our own TPDDL diagnostician, Sheila McBride. -KO This disease, cotton root rot, occurs on winegrapes in the calcareous soils of Central, South, and West Texas where soil pH is well above 7. The most common symptom of CRR in grapes is a sudden wilt and death of the infected… 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 →