Virulent Fungus Devastating Potato Crops

ITHACA, N.Y. -- The fungus responsible for the Irish Potato Famine of the 1840s is back, and could be more threatening than ever. More than 150 years after the famine that took an estimated 1 million lives, a newer virulent strain of the fungus is causing widespread crop devastation in the United States.

Agricultural scientists are finding the fungus, Phytopthora infestans, better known as late blight, difficult to control, says William Fry, a Cornell University professor of plant pathology. Fry believes the new strain of the fungus is a greater threat to potato and tomato crops in the U.S. and Canada than were previous strains because it is resistant to the most effective fungicide, and because the strain is more aggressive.

"Things are worse now than they were a few years ago," says Fry. He and Stephen B. Goodwin, a U.S. Department of Agriculture researcher at Purdue University, warn of the effects of the aggressive new strain of the fungus in an article in the journal Plant Disease.

Before 1992 the new late blight strain, US-8 was not present in the United States or in Canada. In 1992 and 1993, the new strain struck New York State and Maine. By 1995, it was to be found in all eastern states (except Virginia and South Carolina), the eastern Canadian provinces (except Newfoundland), along the entire Canadian border, and in California and Kansas. Last year, US-8 was also found in Idaho, Texas, Colorado, Nebraska and South Dakota.

Scientists say that US-8 is now the most widely distributed strain of late blight in the U.S., and, Fry says, it is also the most problematic because it is resistant to metalaxyl, a generic, commonly used (on late blight) fungicide. This resistance makes suppressing the fungal epidemic more difficult, he says.

US-8 is more aggressive than US-1, the strain responsible for the Irish Potato Famine, which is easily controlled by metalaxyl, according to Fry. The new strain is remarkably rapid and d

Contact: Blaine P. Friedlander, Jr.
Cornell University News Service

Page: 1 2

Related biology news :

1. Fungus-enhanced plants popular with grasshoppers
2. Ant-Fungus Relationship May Provide New Clues About Antibiotics
3. How Can You Tell Whether Corn Is Fungus-Ridden?
4. Household Fungus Contributes To "Sick Building Syndrome"
5. USGS Finds Fungus To Be A Cause Of Fish Lesions In Chesapeake
6. Fatal Frog Fungus Found In The United States
7. Fungus Suspect In Frog Deaths
8. Researcher Uncovers New Species Of Fungus In Wisconsin Lake
9. Devastating parasitic weed may be felled by toxin borrowed from flies
10. New Class Of Protease Inhibitors May Be Effective In Treating One Of Latin Americas Most Devastating Diseases
11. National Network Provides Update On Devastating Corn Disease

Post Your Comments:

(Date:12/4/2019)... ... December 04, 2019 , ... ... has launched Subnovii Advanced Plasma Technology for U.S. dermatologists, plastic surgeons ... is the only plasma to employ LF technology – low frequency plus a ...
(Date:11/27/2019)... ... November 26, 2019 , ... Smile ... Ellyn, IL practice for Invisalign® treatment. Invisalign orthodontics uses a series ... a misaligned bite, also known as malocclusion, present both functional and cosmetic concerns. ...
(Date:11/22/2019)... ... November 21, 2019 , ... The inventors of a new ... a major step forward with that therapy, known as SurVaxM. MimiVax LLC principals ... off from Roswell Park in 2012, has entered into a China-exclusive licensing agreement ...
Breaking Biology News(10 mins):
(Date:1/22/2020)... ... 2020 , ... COBO Technologies and Cardea Bio partner to ... agreed to co-develop and market a portfolio of CRISPR QC products and services ... longer-term, the parties aim to develop a COBO branded QC device based on ...
(Date:1/10/2020)... (PRWEB) , ... January 09, 2020 , ... ... of Drug Development establishes benchmarks for the vendor qualification process, a critical ... Report, the process volume and complexity of the vendor qualification process creates delays ...
(Date:1/10/2020)... ... January 09, 2020 , ... ... announced its inaugural GenScript Biotech Global Forum on Jan. 14 in San Francisco, ... "Cell and Gene Therapy and the Booming China Market," will feature gene and ...
(Date:1/8/2020)... ... 2020 , ... RMA of Connecticut , a leading ... family, has announced that five of their Board-Certified reproductive endocrinologists have been honored ... publishing company Castle Connolly has compiled the list of America’s Top ...
Breaking Biology Technology:
Cached News: