Downy mildew of impatiens is a serious disease in the United States, caused by the fungus-like Oomycete, Plasmopara obducens. Originally found in Europe, impatiens downy mildew was detected in ...

Vineyards in the U.S. and Europe are testing robots for disease monitoring and treatment amid climate stress and labor ...

The cooler weather of fall means conditions are right for downy mildew diseases to develop. Besides the downy mildew that attacks cucumbers, which I have mentioned in previous columns, four other ...

Downy mildew is the most economically important pathogen infecting lettuce Research to benefit conventional and organic farmers and reduce crop loss Research will provide consumers food grown using ...

America's favorite bedding flower is in big trouble, and that trouble has reached the Bay Area. Common impatiens, or Impatiens walleriana, once relatively free of pests, is now contracting a disease ...

October 2025 | Written by: Andrew Kness, M.Sc. Extension Research Assistant, Nathan Kleczewski, Ph.D. Extension Plant Pathologist, Kathryne Everts, Ph.D. Extension Vegetable Plant Pathologist Downy ...

Mildews are the most common and most devastating diseases infecting cucumbers and other members of the cucurbit family of plants, which include squashes, pumpkins, zucchini and melons. There are two ...

Mon dieu—Bordeaux vineyards are currently in deep distress. A downy mildew is affecting grapes in the region, with 90 percent of some vineyards being plagued, The Connexion reported recently. The ...

Downy mildew, caused by a range of oomycete pathogens, remains a formidable challenge in agriculture, affecting numerous crops worldwide and resulting in significant yield losses. The pathogen’s ...

A new disease is devastating stands of red apple ice plant, Aptenia cordifolia. The attractive and previously carefree ground cover is widely planted throughout Southern California, but its popular ...