Cornell Extension: Outdoor Nuisance - Short articles in questions and answers format on various pests and weeds.

Easy Gardening...Disease Control - "Causes of plant diseases, when they occur and how to control them."

Featured Creatures - "Large collection of information sheets on insects, arachnids, and nematodes of importance to Florida residents, arranged by common name, scientific name, and crop or habitat."

Garden Guides - Information on the characteristics of some of the most troublesome garden pests and how to get rid of them.

Garlic Guard - An all natural way to a safe and pest free garden.

Growit.com: Problems Category - "Knowledge base for the nursery industry provides a series of factsheets on insect and nematode pests, viral and fungal diseases, and environmental problems."

Ohioline: Insects and Pests - "Collection of links to fact-sheets (some html, some PDF) on a variety of pest topics, covering house and food products to lawn and garden."

Penn State University: Plant Pathology Fact Sheets - Collection of information sheets about diseases affecting herbaceous and woody ornamental plants in the Northeastern U.S.

PestFacts.org - "Informational site by RISE, an association of specialty pesticide and fertilizer producers. Articles, news, FAQs and links to other resources."

Purdue University Extension - Provides identification of pests and problems associated with plants. Services extended to businesses and individuals throughout Indiana and the US.

Sustainable Gardening Tips: Garden Snake - "Information about keeping snakes out of the garden, and accounts of pet dogs and cats encountering snakes."

Texas Plant Disease Handbook - "Index of plant diseases for crops, flowers, trees and shrubs in and around the Texas areas."

The Extension Toxicology Network (Extoxnet) - "A collaborative effort of several US universities collecting pesticide information profiles, toxicology information briefs, and other factsheets and newsletters."

The Mole Man - "Professional mole trapper provides information on mole behavior, ecology, and control. Illustrated articles, FAQ, listing of several other US trappers by state."

Tree Doctor - "Mostly informational site about tree health, including pages on common pests, dealing with soil compaction, and mycorrhizal and fertilizer treatments. Also contact information for professional arborists in the US."

Univar USA - Information about a wide range of pest insects and rodents.

University of Florida - "Soil organic matter, green manures and cover crops for nematode management."

University of Illinois Extension - A collection of solutions for controlling diseases in the home vegetable garden through Integrated Pest Management.

University of Minnesota Extension - Controlling diseases in the home vegetable garden.

University of Missouri Extension - "Offers information about reducing losses through a combination of methods including sanitation, cultural practices and physical practices."

Vole Control - "Site selling a Bait Station System also provides useful information on voles, their habits, habitat, and life cycle, identification, and help locating their burrows."

West Virginia University Extension Service: Pest Management - "Listing of online publications, includes household pest management information for many insects."

Wildlife Damage Management - "University of Nebraska organization offers information on identification and control of mammal, bird, and reptile pests, a business registry of wildlife services, and links to other university resources."