Featured Research

from universities, journals, and other organizations

Technology reveals citrus greening-infected trees

Date:
August 8, 2011
Source:
USDA/Agricultural Research Service
Summary:
Agricultural scientists are using a technology known as "Fourier transform infrared-attenuated total reflection" spectroscopy to rapidly identify with 95 percent accuracy citrus plant leaves infected with the devastating disease known as citrus greening.

ARS scientists have developed a faster, less expensive way to identify citrus greening disease (Huanglongbing) in plants, one that has the potential to detect the disease before symptoms like those shown here on grapefruit tree leaves are visible.
Credit: Photo by Tim Gottwald

U.S. Department of Agriculture (USDA) scientists are using a technology known as "Fourier transform infrared-attenuated total reflection" (FTIR-ATR) spectroscopy to rapidly identify with 95 percent accuracy citrus plant leaves infected with the devastating disease known as citrus greening.

Scientists from the Agricultural Research Service (ARS) Subtropical Plant Pathology Research Unit in Fort Pierce, Fla., and the agency's Quality and Safety Assessment Research Unit in Athens, Ga., collaborated on the use of FTIR-ATR spectroscopy to identify citrus greening in plants. ARS is the chief intramural scientific research agency of USDA, and this work supports the USDA priority of promoting international food security.

Citrus plants are highly susceptible to citrus greening, also known as Huanglongbing. The disease was discovered in Florida in 2005 and is rapidly spreading in the citrus-growing regions of the state. Fruit from infected trees drops prematurely or fails to ripen.

The current method for detecting citrus greening-infected trees is a type of DNA testing called polymerase chain reaction, which is both costly and time-consuming. FTIR uses light to identify chemicals and reactions in a sample. This technology has the potential to detect the disease before visible symptoms occur, and it is cheaper and faster than the DNA testing.

To test for the presence of the disease, researchers removed a leaf from a citrus tree, dried it out in a microwave, and ground it into a powder. A very small sample of the leaf powder was placed on top of an ATR plate. The system clearly distinguished citrus greening-infected leaves from healthy leaves. The scientists say more work will be need to diferentiate between leaves infected with citrus greening and those infected with other citrus diseases.

The Fort Pierce team included physical scientist Gavin Poole and research leader Tim Gottwald, while the Athens team was composed of chemist Samantha Hawkins, engineer Bosoon Park, physiologist William Windham and research leader Kurt Lawrence.

Results of this research were published in Applied Spectroscopy in 2010.

Read more about this research in the August 2011 issue of Agricultural Research magazine at: www.ars.usda.gov/is/AR/archive/aug11/trees0811.htm


Story Source:

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


Journal Reference:

  1. Samantha A. Hawkins, Bosoon Park, Gavin H. Poole, Timothy Gottwald, William R. Windham, Kurt C. Lawrence. Detection of Citrus Huanglongbing by Fourier Transform Infrared–Attenuated Total Reflection Spectroscopy. Applied Spectroscopy, 2010; 64 (1): 100 DOI: 10.1366/000370210790572043

Cite This Page:

USDA/Agricultural Research Service. "Technology reveals citrus greening-infected trees." ScienceDaily. ScienceDaily, 8 August 2011. <www.sciencedaily.com/releases/2011/08/110808104534.htm>.
USDA/Agricultural Research Service. (2011, August 8). Technology reveals citrus greening-infected trees. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/08/110808104534.htm
USDA/Agricultural Research Service. "Technology reveals citrus greening-infected trees." ScienceDaily. www.sciencedaily.com/releases/2011/08/110808104534.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
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