You are here:

Plant Diseases/Expert Profile

Ask A Question


Plant Diseases and Disorders of Lawn Grasses, Trees, Vegetables,and Ornamentals

Experience in the area

Plant Diseases Identification and Management


B.S. Botany --- Miss. State Univ. M.S. Plant Pathology --- Miss. State Univ. Ph.D. Plant Pathology --- Texas A & M Univ.

Average Ratings

Recent Reviews from Users

Read More Comments

    K = Knowledgeability    C = Clarity of Response    P = Politeness
Brian11/05/16101010Thank you for taking time to answer .....
Gayle 07/07/16101010Thank you so much for your information .....
Beatriz06/17/16101010Thank you for your thorough answer. I .....

Recent Answers from Dr Stephen Vann

2017-01-25 greenhouse tomatoes:

Greg:    The symptoms that you describe could most likely be either an injury from contact from a toxic material OR a possible virus infection.  A representative symptomatic plant sample would have to

2017-01-23 coco plums:

Debbie:    I do not recognize a particular infectious disease from your photo.      Copper fungicides can be effective for many foliar diseases of ornamentals, but can also cause some injury if not mixed

2017-01-22 coco plums:

Hi Debbie:    Thanks for your question.  Can you send me a couple of photos of the affected plants? Try to include a closeup of a group of leaves with the representative spots that you are concerned about

2016-11-05 Are Plants Aware:

FOLLOWUP INFORMATION.    Brian:    Just saw this advertisement for a book that you may be interested in reading that relates to your previous question.  I plan to get it and check it out.  Cheers!    The

2016-10-14 Brown spot, scale, or something else?:

Sherry:    If these spots were scale insect,they should be raised somewhat and can be removed by gentle scraping them with your fingernail.    If the spots were fungal or bacterial in nature,they would


Ask A Question

Plant Diseases

All Answers

Answers by Expert:

Ask Experts


©2017 All rights reserved.