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- John Cawly
Plant Diseases/Expert Profile
Expertise
I can help with identification and possible treatment of plant diseases that affect houseplants and horticultural species, to include both biological (fungal, bacterial, viral, parasitic etc.) and environmental/cultural (watering, potting media, etc.) aspects.
Experience in the area
Practical experience with a wide variety of houseplants and greenhouse plants, including cacti, euphorbia, african violets, amaryllus, and many others.
Organizations
American Phytopathology Society
American Society of Plant Biologists
American Society for Virology
Publications
Molecular Plant Microbe Interactions
Proceedings of the National Academy of Science (in print)
Rhodora -- Journal of the New England Botanical Society
Allelopathy Journal
Education/Credentials
BS, Southern Illinois University - Biological Sciences
MS, Southern Illinois University -- Biological Sciences - Genetic Engineering Specialization
PhD, University of Missouri Columbia -- Plant Microbiology and Pathology
(Viral Diseases specialization/Biotechnology Emphasis)
Average Ratings
Recent Reviews from Users
K = Knowledgeability C = Clarity of Response P = Politeness| User | Date | K | C | P | Comments |
|---|---|---|---|---|---|
| Armaz | 02/10/12 | 10 | 10 | 10 | How wonderful that people like John Crawly ..... |
| Antonio | 01/11/12 | 10 | 10 | 10 | |
| Jim | 01/11/12 | 10 | 10 | 10 | Thank you for the prompt response. I ..... |
| green | 01/03/11 | 10 | 10 | 10 | I could have been more clear, but ..... |
| Ellen | 04/29/08 | 10 | 10 | 10 | thank you very much! |
Recent Answers from John Cawly
2012-02-09 Pachira Aquatica trouble ?:
Dear Armaz, Thank you for the additional information. Your advice was exactly correct. In low light conditions, nutrients are not needed. Also, too much water can promote root diseases. I would
2012-02-06 Pachira Aquatica trouble ?:
These plants are usually pretty durable and disease free. This species is native to tropical swamps, so the use of fertilizers should be done sparingly. With this having been said, the chlorosis (yellowing)
2012-02-02 apple:
Hello Vivek, I am sorry to say that once a pathogen infects the root systems, there is little you can do to save the apple trees. Soil fumigation is a very expensive process, and the results are variable
2012-01-18 Brown leaves on tomato plants:
These symptoms are classic for a tomato (or tobacco) virus. The lesions (yellowing and dying spots) on the leaves suggest a viral infection rather than a fungal infestation. The two major fungal diseases
2012-01-11 Marigold disease:
Hi shay, I am very sorry for not answering sooner. Since I am not an expert on insects, I am afraid that I cannot be of much help unless a description of the insect is more precise. There are virtually
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