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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.
Practical experience with a wide variety of houseplants and greenhouse plants, including cacti, euphorbia, african violets, amaryllus, and many others.
American Phytopathology Society
American Society of Plant Biologists
American Society for Virology
Molecular Plant Microbe Interactions
Proceedings of the National Academy of Science (in print)
Rhodora -- Journal of the New England Botanical Society
Allelopathy Journal
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)
| User | Date | K | C | T | P | Comments |
|---|---|---|---|---|---|---|
| Ellen | 04/29/08 | 10 | 10 | 10 | 10 | thank you very much! |
| Julia | 04/28/08 | 10 | 10 | 6 | 10 | |
| Amir | 04/24/08 | 10 | 10 | 10 | 10 | |
| Diane | 04/17/08 | 10 | 10 | 10 | 10 | |
| Trevor | 04/02/08 | 10 | 10 | 10 | 10 | Excellent advice and spot on as top ..... |
Hi Debra, The most common pests/diseases that affect Rubeckia species are: aphids, which suck sap from the plants and coat the leaves with sticky honeydew; goldenglow sawfly, the larvae of which may
Hi Amir, There are many methods that can be used to control aphid populations. Some are as simple as spraying with a powerful water hose. Many people encourage beneficial insects such as ladybird
Once thought to be aphids, adelgids are fluid-feeding insects that feed on coniferous species. The egg sacs of these insects look like the tips of cotton swabs clinging to the undersides of the branches
Hi Amir, Thank you for the photos. The plants you have are azaleas, and they appear to be healthy to me. The leaves may have a small amount of powdery milder, but that is not a problem. These plants
Hi Gennie, Have you had an unusually wet spring? These conditions provide ideal conditions for fungal spore germinations. The aloe plants also can have ring spots or black spots that are related to

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