Featured Research

from universities, journals, and other organizations

Scientists, Cooperators Identify Potato Pest

Date:
July 1, 2007
Source:
USDA/Agricultural Research Service
Summary:
The pale potato cyst nematode (Globodera pallida) has been positively identified by Agricultural Research Service (ARS) scientists and cooperators in soil at a potato processing plant in eastern Idaho. This is the first time this pest--now of great concern in Europe--has been found in the United States.

Globodera pallidacysts. Cysts are the egg-engorged bodies of dead female nematodes. Eventually, the cysts dislodge from a plant root and the eggs hatch.
Credit: Image courtesy of Zafar Handoo, ARS

The pale potato cyst nematode (Globodera pallida) has been positively identified by Agricultural Research Service (ARS) scientists and cooperators in soil at a potato processing plant in eastern Idaho. This is the first time this pest—now of great concern in Europe—has been found in the United States.

Related Articles


The source of the infected soil at the processing plant was later traced to a few potato fields in Idaho, according to the researchers with ARS and the University of Idaho.

The ARS research team in Beltsville, Md., that performed the identification included molecular biologist Andrea Skantar in the Molecular Plant Pathology Laboratory; and microbiologist Zafar Handoo, plant pathologist Lynn Carta, and research leader David Chitwood in the Nematology Laboratory.

Handoo led the morphological identification, using microscopic examination and measurement of anatomical features that are distinct for cysts and immature juveniles of G. pallida. Skantar led the molecular analysis, comparing DNA from the nematode specimens with known reference material.

Existing molecular tests are very good at distinguishing G. pallida from golden nematode (G. rostochiensis), due to previous research in Europe where both species are found. However, scientists cannot readily use anatomical differences to distinguish G. pallida from another close relative called the tobacco cyst nematode (G. tabacum), a nematode already in the United States. Reliable molecular tests to identify G. tabacum have not been widely validated, largely because tobacco cyst nematode is not widespread in Europe, where much of the prior research has been done.

Skantar developed a new diagnostic test that may become useful in the future, as the national survey is conducted to determine the extent of the potential spread of the pale potato cyst nematode. In the new assay, specific PCR primers recognize minor differences in the DNA sequences of each nematode species, resulting in a clear, positive test result when G. tabacum is present.

Fields in the United States may include both G. pallida and G. tabacum, so it is important to be able to tell these species apart. The new test represents a proactive step aimed at preventing diagnostic confusion as future identifications become necessary.

ARS is the U.S. Department of Agriculture's chief scientific research agency.


Story Source:

The above story is based on materials provided by USDA/Agricultural Research Service. Note: Materials may be edited for content and length.


Cite This Page:

USDA/Agricultural Research Service. "Scientists, Cooperators Identify Potato Pest." ScienceDaily. ScienceDaily, 1 July 2007. <www.sciencedaily.com/releases/2007/06/070628062709.htm>.
USDA/Agricultural Research Service. (2007, July 1). Scientists, Cooperators Identify Potato Pest. ScienceDaily. Retrieved November 23, 2014 from www.sciencedaily.com/releases/2007/06/070628062709.htm
USDA/Agricultural Research Service. "Scientists, Cooperators Identify Potato Pest." ScienceDaily. www.sciencedaily.com/releases/2007/06/070628062709.htm (accessed November 23, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, November 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

Ebola-Hit Sierra Leone's Late Cocoa Leaves Bitter Taste

AFP (Nov. 23, 2014) The arable district of Kenema in Sierra Leone -- at the centre of the Ebola outbreak in May -- has been under quarantine for three months as the cocoa harvest comes in. Duration: 01:32 Video provided by AFP
Powered by NewsLook.com
Anglerfish Rarely Seen In Its Habitat Will Haunt You

Anglerfish Rarely Seen In Its Habitat Will Haunt You

Newsy (Nov. 22, 2014) For the first time Monterey Bay Aquarium recorded a video of the elusive, creepy and rarely seen anglerfish. Video provided by Newsy
Powered by NewsLook.com
Birds Around the World Take Flight

Birds Around the World Take Flight

Reuters - Light News Video Online (Nov. 22, 2014) An imperial eagle equipped with a camera spreads its wings over London. It's just one of the many birds making headlines in this week's "animal roundup". Jillian Kitchener reports. Video provided by Reuters
Powered by NewsLook.com
Could Your Genes Be The Reason You're Single?

Could Your Genes Be The Reason You're Single?

Newsy (Nov. 21, 2014) Researchers in Beijing discovered a gene called 5-HTA1, and carriers are reportedly 20 percent more likely to be single. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins