Potato psyllid dissected for clues to better controlling it

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

U.S. Department of Agriculture (USDA) scientists are leaving no stone unturned when it comes to finding new ways of managing "zebra chip" and the insect that can spread this plant disease to potato crops.

In Wapato, Wash., USDA Agricultural Research Service (ARS) entomologist Rodney Cooper is using fine-tipped forceps and a fluorescent microscope to dissect the organs and tissues of the potato psyllid, a tiny, cicada-like insect which can transmit the bacterium Candidatus Liberibacter solanacearum, the cause of zebra chip.

Cooper combines the procedure with fluorescent genetic markers to understand where and how Liberibacter survives in the psyllid, from the moment it is ingested by the insect pest to the time it is injected into new plants. The information is important on several fronts—from improved experimental designs and data interpretation to better decision-making on how best to detect, control and prevent zebra chip, notes Cooper, who works at the ARS Fruit and Vegetable Insect Research Unit in Wapato. ARS is USDA's chief intramural scientific research agency.

Zebra chip gets its name from the dark bands it causes inside tubers. The bands are especially pronounced after the potatoes are cut and fried. Other symptoms include curled leaves and tissue discoloration. Zebra chip poses no consumer danger, but it is unsightly and can diminish tuber marketability.

After dissecting a psyllid specimen in his lab, Cooper subjects its excised organs and tissues to probes that glow green if the disease is present. Using this microscope-aided method, Cooper and his colleagues have observed Liberibacter in four main areas of the psyllid: its gut, hemolymph, bacteriomes (organs where symbiotic bacteria reside), and salivary glands.

The primary disease control method involves spraying potato crops with insecticides. However, researchers are seeking to provide growers with more sustainable approaches, particularly resistant varieties. Information from Cooper's psyllid dissections may also eventually set the stage for targeting Liberibacter directly.


Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...


Comments (0) Leave a comment 

Name
e-Mail (required)
Location

Comment:

characters left


Pacesetter Grain Hopper

The Pacesetter Gain Hopper features original and innovative ideas like the patented RollerTrap™, the industry’s easiest to open and maintain trap ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form