Ziektes en gebreken uit de Verenigde Staten

A potato disease that arrived late this summer in the Pacific Northwest called zebra chip likely can't be spread by planting infected seed, new research suggests.

El Departamento de Agricultura de los Estados Unidos (USDA, por sus siglas en inglés), en colaboración con tres universidades más, ha lanzado recientemente un sitio web para difundir información relacionada con el virus Y (PVY) de la papa. Este sitio s...

The USDA, in cooperation with three major universities, recently launched a web site to disseminate information related to Potato Virus Y. This information will prove useful to all groups of people who need information about PVY, from potato growers, to scientists, to people working within the potato industry, to consumers of potatoes and potato products.

Zebra chip disease nearly destroyed a large USA potato growing business, its owner and chief executive told the Cambridge University Potato Growers Research Association conference earlier this month.

Idaho should consider a more stringent cap on the percentage of seed potatoes infected with potato virus Y that may be replanted for more seeds, an industry expert advised. The current cap is 2 percent. PVY is an aphid-spread disease that reduces both...

More than a decade has passed since Jim Tiede was among the growers caught up in a debacle over the first U.S. genetically modified potato variety. Even today, the American Falls, Idaho, farmer copes with the fallout of planting Monsanto's GM potato N...

Zebra chip, a disease that affects potatoes, was recently found in the potato-growing regions of Washington, Oregon and Idaho. The discovery brings to focus the growing need for scientific answers – something that will be discussed at the SCRI Zebra Ch...

In light of the recent confirmation of zebra chip in Idaho, Focus on Potato, a nonprofit potato crop management resource, has made open access its presentation on Zebra Chip Disease of Potatoes by Gary Secor of North Dakota State University. This pres...

'Focus on Potato' of the Plant Management Network has published a new webcast: Common Scab of Potatoes By Thomas A. Zitter Ph.D., Professor, Dept of Plant Pathology, Cornell University, Ithaca, New York

Two new infestations of a microscopic wormlike pest that attacks potato plants have been discovered in eastern Idaho, state and federal agriculture officials say. Lloyd Knight of the Idaho Department of Agriculture said that both infestations of the p...

A potato pest from points south has reached Idaho, University of Idaho Extension specialists with the College of Agricultural and Life Sciences confirmed this week. It was reported last month in Oregon and Washington.

Potato late blight, that same disease that caused the Irish Potato Famine, resurfaced in Alaska this fall. This wasn’t the first time the disease, widespread in the Lower 48 and worldwide, came to Alaska. Plant pathologist Jenifer McBeath suspects it...

Potato growers in Eastern Idaho are questioning the effectiveness of the USDA's efforts to contain the pale cyst nematode (Globodera Pallida), a small wormlike pest that endangers Idaho's potato export markets. Several U.S. trading partners, including...

Zebra chip, a disease that annually costs Southwest U.S. potato growers millions of dollars in crop loss, has been found in Washington and Oregon. A USDA scientist and an Oregon State University plant pathologist confirmed zebra chip in tuber samples ...

Late blight has shown up in the fields of two potato producers, in Palmer and Delta Junction. Alaska. The University of Alaska Fairbanks Cooperative Extension Service is working with major potato producers to help prevent the spread.

A new USDA-funded consortium will provide nationwide tracking of late blight infections of potato and tomato.  A web site currently under development will allow users to report where late blight has been found, and to sign up for automatic notifications by email or text message when late blight is found nearby.

Given that world potato production is about 320 million tons per year (20 million tons per year in the United States) and world tomato production is about 120 million tons per year (13 million tons per year in the U.S.), late blight is a major problem worldwide even today.

"Focus on Potato"of the Plant Management Network has published a new webcast:Early Blight: A Global Management Issue on PotatoesBy Walter R. Stevenson, Ph.D.Professor EmeritusUniversity of WisconsinMadison, Wisconsin