By Subject

By Editor

Wheat diseases mostly a no-show so far

Whether measured by the calendar or by wheat growth stage, the level of diseases in wheat fields across Arkansas appears to be unusually low. So far, only barley yellow dwarf has been confirmed from plots at Marianna. The probability of a stripe rust epidemic this year is extremely low. Given this lack of foliar fungal

Continue reading Wheat diseases mostly a no-show so far

Wheat Growers Encouraged to Respond to National Survey on Wheat Scab

National survey on wheat and barley head scab

This spring, about 16,500 wheat and barley growers in 17 states (450 in Arkansas) will receive a questionnaire on Fusarium head blight (scab) from the National Agricultural Statistics Service (NASS). Scab is a fungal disease that infects the heads of small grain plants. It can be severely

Continue reading Wheat Growers Encouraged to Respond to National Survey on Wheat Scab

Wheat after corn or sorghum leads to higher risk for scab

Fusarium head blight or scab disease of wheat has been a minor problem in Arkansas since 1991 when scab contributed to the record low state average yield of 22 bushels / acre. Given that there are more than one million acres of corn and sorghum in Arkansas this year, a significant portion this fall’s wheat

Continue reading Wheat after corn or sorghum leads to higher risk for scab

Low risk for Fusarium head blight (scab) in wheat

Wheat south of I-40 is mostly past flowering and beyond the most susceptible growth stage for infection. Although some wheat in northeast Arkansas is still at the critical flowering stage, the risk for scab is forecast to be low based on weather variables. There does not appear to be a need for a fungicide application

Continue reading Low risk for Fusarium head blight (scab) in wheat

Wheat disease update – May 3, 2013

Stripe rust is still increasing on susceptible varieties at locations where it blew in during the spring. The most susceptible varieties are Arcadia, Progeny 117, Progeny 185, and USG 3993. Except for a few fields, stripe rust does not appear to be having a significant impact on yield because of adult-plant resistance and one or

Continue reading Wheat disease update – May 3, 2013

Wheat Disease Update, 26 April 2013

The black fruiting bodies associated with stripe rust lesions are telia of the stripe rust fungus and signal and end of the stripe rust epidemic.

I evaluated plots near Kibler, Rohwer, and Mariana on 24-25 April. At Kibler, maturities ranged from early boot to flowering, and only low levels of leaf blotch were found on

Continue reading Wheat Disease Update, 26 April 2013

Wheat Disease Update, 18 April 2013

Unlike last week’s report that was based on emails and phone calls, this report is based on observations in plots at Rohwer, Keiser and Newport and fields along the way.

Stripe rust was serious only in areas where it overwintered on varieties with low levels of adult-plant resistance and either no fungicide was applied

Continue reading Wheat Disease Update, 18 April 2013

Update on wheat stripe rust, March 15

Based on observations from plots at the Rohwer Experiment Station in Desha County, Beretta, Ricochet and Progeny 185 were the most susceptible varieties to stripe rust and had hot spots with numerous infected leaves. Scattered leaves with stripe rust were found on 26R20, Arcadia, Coker 9553, Harrison, Progeny 308, and Terral 8861.

In previous years,

Continue reading Update on wheat stripe rust, March 15

Decision time near for early-season stripe rust management

The plants in the picture below were from one of the stripe rust hot spots found in a Lonoke County wheat field in December. The plants were dug up on January 9 and placed in a growth chamber for 2 weeks at a cool temperature favorable for stripe rust. The lower leaves that had stripe

Continue reading Decision time near for early-season stripe rust management

Another record for earliest wheat stripe rust

Brent Griffin, Extension Agent in Prairie County, found at least four hot spots of stripe rust on his family’s farm in northern Lonoke County on December 19, 2012. This beats the record set last January by about one month. The hot spots are now about 3 feet in diameter and are on an unknown variety

Continue reading Another record for earliest wheat stripe rust