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Production
Oregon State University Onion Information California Onion Production Information Allium Species - the Perennial Onions
New Mexico Crops Onion Index Onions - Texas A & M
Commercial Dry Bulb Onions Onions - North Dakota United Agri Products

Marketing
The Vidalia Onion Web Welcome to the National Onion Association Online About Texas Sweet Onions

Insects
Bulb Mites Maggots Pea Leafminer
Wheat Curl Mites Nematodes
UC Pest Management Guidelines: Pests of Onion and Garlic Chemical Control of Onion Thrips - Fruita, CO Western Colorado Thrips

 

Diseases
Bacterial Soft Rot Basal Rot Black Mold
Blue Mold Rot Botrytis Leafspot Downy Mildew
Pink Root Purple Blotch and Stemphylium Leaf Blight Sour Skin
Soil-Borne Diseases White Rot IYSV Links
Iris Yellow Spot Virus Onion Diseases - Canada Onion (Allium cepa ) -- Iris Yellow Spot
Botrytis, Downy Mildew, Purple Blotch Xanthomonas Leaf Blight

 Problems of Stored Garlic
Increasing Outbreak and Impact of Iris Yellow Spot Virus in Bulb and Seed Onions in the Imperial and Antelope Valley of California IYSV on Onion and Leek in Western Oregon

Weeds
Weed Photo Gallery Integrated Weed Management Special Weed Problems
Susceptibility of Weeds to Herbicide Control Herbicide Treatment Table
     

Seed Companies
American Takii Asgrow Vegetable Seeds Bejo Seeds Inc.
Champion Seed Crookham Harris Moran Seed
Keithly Williams Seeds Palmer Seed Petoseed
Sunseeds