Fall frost and Johnsongrass concerns for beef cattle
The Winchester Star
We have started to see temperatures decreasing at night, and we have seen the first frost of the fall. In some places, there is a lot of Johnsongrass in pastures and hayfields, and that brings up concerns for cattle producers. That is because Johnsongrass contains cyanic compounds which, under certain stresses, can result in cyanide poisoning when consumed by beef cattle.