The presence of mycotoxins in silage can only be determined by laboratory analysis, says Charles Woloshuk, associate professor in the department of botany and plant pathology at Purdue University.

To prevent mycotoxin levels from increasing in a silage sample during transit to a lab, dry the sample at a moderate temperature — about 140 degrees Fahrenheit — before shipping. Or, freeze the sample and ship it on ice overnight.

It’s also a good idea to periodically collect samples and freeze or dry them, says Woloshuk. That way, if you suspect a problem, then you have a sample on-hand that you can quickly send off for analysis.