In many parts of the United States, plants are packing it in for winter, but the plant disease diagnostic clinic at Cornell University can still provide some answers to houseplant and greenhouse questions. Bookmark the site for when the growing season brings all sorts of plant troubles. The Clinic works closely with the "Cornell Cooperative Extension" county offices. The range of plants they can...

This Web site from the Cornell Institute for Food, Agriculture, and Development contains a newly developed prototype of the "Global Crop Pest Identification and Information Services in Integrated Pest Management (IPM)." Available in English and Spanish, this online guide aims to "increase crop pest diagnosis and IPM information capability among extensionists and farmers of developing countries."...

The Department of Plant Pathology at Cornell University provides this online guide to vegetable diseases. A compilation of vegetable disease fact sheets, the site is organized by crop and offers photographic images and a description of each vegetable crop in healthy and diseased states. The site also includes an Online Glossary of Technical Terms in Plant Pathology and links to additional...