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Newswire : Potatoes blighted

点击量:   时间:2017-10-09 07:02:04

A new, aggressive strain of late blight (Phytophthora infestans), the fungus that caused the Irish potato famine in the 1840s, is devastating potatoes and tomatoes throughout the US and eastern Canada, warn scientists in the US. William Fry at Cornell University in New York State and Stephen Goodwin at Purdue University in Indiana say the strain, called US-8, is resistant to metalaxyl, the fungicide most commonly used to treat late blight. In Plant Disease (vol 81, p 1349),