This summer’s excessive rain has left the wheat harvest lagging behind and the crop in suboptimal condition, according to one grain management expert.
Dr. Max Hawkins, a nutritionist with Alltech’s Mycotoxin Management Team, said that the most common mycotoxin issue with wheat is Deoxynivalenol (DON), produced by Fusarium graminareum mold. This is the same mold that produces Fusarium Head Blight (FHB), and the two are commonly associated in wheat. However, in some cases DON can still be present even if FHB is not spotted.
Fusarium graminareum prefers extended wet periods or relative humidity more than 90 percent with temperatures from 59 to 85 degrees Fahrenheit. The maps for June rainfall and temperature indicate these factors have been in play across a major portion of the Grain Belt.
“In the 2014 wheat crop, there are reports from across the U.S. of DON levels ranging from two parts per million (ppm) to 14 ppm. There are areas where the wheat has been relatively free of DON and bushel test weights have been excellent,” Hawkins said. “However, the areas contaminated with DON are increasing as rainfall and temperature play a more significant role. There have been recent reports of wheat being rejected at grain terminals for DON levels ranging from five ppm to more than 10 ppm.”
Wheat is often a standard alternative to corn in poultry and swine diets. Wheat can also be utilized to stretch a short corn supply or at certain times be a more economic replacement for corn. However, just as in corn, there can be a risk for mycotoxins.
“It is highly recommended to have the grain analyzed prior to feeding. Alltech’s 37+TM laboratory provides an in-depth analysis of 38 different mycotoxins and not only analyzes for DON but also for six different Type B Trichothecenes that can be formed by Fusarium graminareum,” Hawkins said. “The employment of a total mycotoxin management program that covers all areas from the field to the feeder will provide the greatest amount of information and the safest feed possible.”