Roses do not have thorns; they have prickles. But there ARE “thorns” in the rose garden. Their names are botrytis, black spot ...

Downy Mildew is a fungus-like disease that attacks impatiens, as Cindy and her husband found out when they investigated why their impatiens were wasting away. You can see the white fuzz that gives ...

Downy mildew leaf spots are more angular than round and usually have yellow halos. Keinath reports that this year’s leaf spots are smaller than what is normally seen, only an eighth to a quarter ...

Cool nights and warm daytime conditions have brought downy mildew back into the spotlight on Long Island. The disease, which affects impatiens walleriana, is spread by air and by the splashing of ...

Downy mildew, which looks strikingly similar to black spot, can become an increasing problem. “People are confusing them,” he said. “It’s difficult to tell the two apart.” Black spot ...

Your description indicates that you have had downy mildew on your impatiens. Downy mildew of impatiens has been observed in the United States since about 1994 but became more widespread and ...

Downy mildew is one of the most economically important diseases of cultivated lettuce worldwide. More information: Beiquan Mou, Green Leaf, Red Leaf, and Romaine Lettuce Breeding Lines with ...

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.

Downy mildew is a damaging foliar disease of grapes, leading to yield losses of up to 75% in key growing areas [1]. The global fungicide market, valued at over $24.5 billion in 2024, is projected ...