By Brooklyn Botanic Garden. A common-sense approach to plant disease prevention
Keyword: Plant diseases
WSU’s Pest Leaflet Series
“The Pest Leaf Series (PLS) was initiated in the WSU Puyallup Plant & Insect Diagnostic Laboratory to produce brief “bulletins” on problems frequently received at the laboratory, for which no formal extension bulletins or other readily available information exists. The PLS covers insect problems, diseases, abiotic problems, and other miscellaneous situations on which we are regularly asked to provide information.”
Invasive and Exotic Species of North America – Images
A photo database of invasive plants, plant diseases and harmful insects, plus biological control agents providing “an accessible and easily used archive of high quality images…with an emphasis on educational applications.” Images are available to download for non-profit and educational purposes.
Forestry Images
Insect, disease, and other images
Garden Tip #193
National Gardening Association’s Pest Control Library is a pictorial guide to diagnosing pests and diseases. Every article has a color picture to help confirm if the pest in question looks like the bug eating your plant. Major plant diseases are also included and organized by the part of the plant it infects: leaf, fruit, roots or all parts.