 |
 |
|
|
|
National & World Ag News Headlines |
 |
New Bacterial Pathogen Found in Texas Corn
USAgNet - 10/25/2016
A new bacterial pathogen, bacterial streak, was found in the Texas Panhandle corn crop this year, and while its effects were inconsequential, it bears watching in the future, according to Texas A&M AgriLife Extension Service specialists.
In June and July, corn leaves with brown, tan, orange to reddish streaks or stripes were observed and fully confirmed in a few fields in Hansford and Hutchinson counties in the Texas Panhandle, said Dr. Ron French, AgriLife Extension plant pathologist in
Amarillo.
French visited a couple fields with infected plants and saw that in initial development, leaf lesions were limited to between-leaf veins. But in later development, the lesions extended beyond the veins with a wavy, uneven shape rather than rectangular shape.
The lesions varied in length from half an inch to several inches and occurred throughout the leaf blade, French said. The lesions were translucent when held up to the light. These foliar symptoms were also seen in several other states where the disease has been
found.
The disease, bacterial streak, caused by the Xanthomonas vasicola pv. vasculorum bacteria, was confirmed in Texas by French's plant pathology lab in Amarillo, the Great Plains Diagnostic Network Regional Lab at Kansas State University, and by the U.S.
Department of Agriculture Animal and Plant Health Inspection Service in Maryland, he said.
The good thing, said Dr. Tom Isakeit, AgriLife Extension plant pathologist in College Station, is this disease has not been confirmed in other corn production areas of Texas. Also, there is no indication that this disease can cause adverse impacts in yield or quality
in any of the states where it has been found.
French said while many diseases caused by other Xanthomonas can be seed borne on other crops, it is not known if bacterial leaf streak of corn is seed borne.
In Texas corn production areas, gray leaf spot is a minor disease, if it occurs at all, Isakeit said.
|
 |
|
 |
|
Copyright © 2024 - Farms.com. All Rights Reserved. |
 |
|
