Category Archives: DISEASE

General folder containing disease common name

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 →

2015 Texas – Bacterial blight of cotton

Posting some news about bacterial blight of cotton issues that is currently going on in Texas. The URL link below point to a pdf document containing information (brief update) provided by Dr. Jason Woodward (Extension Plant Pathologist) and Dr. Terry Wheeler (Research Pathologist), both located at the Texas A&M Research and Extension Center in Lubbock, TX. They have made some “peculiar observations” of bacterial blight on cotton varieties that were previously documented as resistant.  This note provide growers, consultant and county agents descriptions and images to help with recognizing… Read More →

Actinopelte Leaf spot

The following is a blog post writing assignment from 2013 summer BURS (Bioenvironmental Undergraduate Research Scholar) and BESC 484 student, A. Brake.  As previously mentioned, the student is asked to submit a short write up of something that interest them (related to plant pathology) which they may have seen or heard about in the Plant Clinic.  They are also highly encouraged to take photographs of subject (training in photo documentation).  Ms. Brake submitted a couple of excellent photo with her assignment below where she used a Dino-lite digital… Read More →