Last year's cool, rainy weather made a lot of corn susceptible to molds and toxins. That is why Dairyland Laboratories has extended its special pricing for mycotoxin-testing.

"There's been a much higher incidence of finding mycotoxins this year and a much higher incidence of testing (for it)," says Dave Taysom, lab director.

Of the 645 corn-grain samples tested at the lab from the states of Minnesota, Iowa, South Dakota and North Dakota, 25 percent were positive for vomitoxin at levels between 1 to 6 parts per million; 2 percent were positive at levels between 6 and 20 ppm, and 0.3 percent were positive at levels greater than 20 ppm.

Meanwhile, of 73 corn-silage samples from those same four states, 63 percent were positive for vomitoxin between 0.5 and 6 ppm and 14 percent were positive between 6 and 20 ppm.

Here is a summary of mycotoxin-testing at Dairyland Labs from Oct. 1 through Jan. 26.