Featured Research

from universities, journals, and other organizations

Scientists Seeking Biocontrols Against Sharpshooters

Date:
November 3, 2005
Source:
USDA/Agricultural Research Service
Summary:
Help may be on the way from Agricultural Research Service (ARS) scientists in Argentina and Texas for grape growers in California who are battling the glassy winged sharpshooter. A parasitic wasp could help growers ward off the glassy winged sharpshooters (GWSS) that have been spreading plant-damaging Xylella fastidiosa bacteria in southern California vineyards since the 1990s.

This parasitic wasp, Gonatocerus triguttatus, lays its eggs in glassy-winged sharpshooter eggs embedded in leaves. Two new wasps, G. tuberculifemur and G. metanotalis, have recently been found to attack this sharpshooter's eggs as well.
Credit: Photo by Reyes Garcia III

Help may be on the way from Agricultural Research Service (ARS) scientists in Argentina and Texas for grape growers in California who are battling the glassy winged sharpshooter.

A parasitic wasp could help growers ward off the glassy winged sharpshooters (GWSS) that have been spreading plant-damaging Xylella fastidiosa bacteria in southern California vineyards since the 1990s. Now sharpshooters have made it to Hawaii and Tahiti. ARS scientists in Weslaco, Texas, have shown that the invasive GWSS in California is from Texas--part of the pest's native habitat.

X. fastidiosa causes a variety of costly plant diseases, including Pierce's disease in grapevines and leaf scorch in oleanders. Grape growers in Riverside and San Diego counties have lost about $38 million due to Pierce's disease.

For over a decade, ARS scientists and researchers at the University of California-Riverside and the California Department of Food and Agriculture have been seeking biocontrol strategies to control the sharpshooter.

At the ARS South American Biological Control Laboratory (SABCL) in Hurlingham, Argentina, researchers have been evaluating wasps that lay their eggs inside GWSS eggs, which are later consumed by the wasp young as they hatch and feed.

The primary candidate for this form of biological control is currently Gonatocerus tuberculifemur from South America. G. tuberculifemur is being tested at both the SABCL and the Beneficial Insects Research Unit in Weslaco, but the wasp has not yet been released.

Researchers in Weslaco are also searching for nymphal parasitoids in their native range in Texas. To date, all the biological control Gonatocerus species agents are egg parasitoids.

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 Seeking Biocontrols Against Sharpshooters." ScienceDaily. ScienceDaily, 3 November 2005. <www.sciencedaily.com/releases/2005/11/051103083252.htm>.
USDA/Agricultural Research Service. (2005, November 3). Scientists Seeking Biocontrols Against Sharpshooters. ScienceDaily. Retrieved July 28, 2014 from www.sciencedaily.com/releases/2005/11/051103083252.htm
USDA/Agricultural Research Service. "Scientists Seeking Biocontrols Against Sharpshooters." ScienceDaily. www.sciencedaily.com/releases/2005/11/051103083252.htm (accessed July 28, 2014).

Share This




More Plants & Animals News

Monday, July 28, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Sea Turtle Hatchlings Emerge from Nest

Raw: Sea Turtle Hatchlings Emerge from Nest

AP (July 27, 2014) A live-streaming webcam catches loggerhead sea turtle hatchlings emerging from a nest in the Florida Keys. (July 27) Video provided by AP
Powered by NewsLook.com
Trees Could Save More Than 850 Lives Each Year

Trees Could Save More Than 850 Lives Each Year

Newsy (July 27, 2014) A national study conducted by the USDA Forest Service found that trees collectively save more than 850 lives on an annual basis. Video provided by Newsy
Powered by NewsLook.com
What's To Blame For Worst Ebola Outbreak In History?

What's To Blame For Worst Ebola Outbreak In History?

Newsy (July 27, 2014) A U.S. doctor has tested positive for the deadly Ebola virus, as the worst-ever outbreak continues to grow. Video provided by Newsy
Powered by NewsLook.com
The New York Times Backs Pot Legalization

The New York Times Backs Pot Legalization

Newsy (July 27, 2014) The New York Times has officially endorsed the legalization of marijuana, but why now, and to what end? 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:
from the past week

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