An Iowa State University agronomy professor says erratic Midwest weather that's veered from drought conditions to excessive rain is fueling toxic weed growth in pastures

An Iowa State University agronomy professor says erratic Midwest weather that's veered from drought conditions to excessive rain is fueling toxic weed growth in pastures

An Iowa State University agronomy professor says erratic Midwest weather that's veered from drought conditions to excessive rain is fueling toxic weed growth in pastures -- including plants that are poisonous to cattle. Shelby Gruss says it's important to keep a healthy stand of grasses in low-lying areas where water tends to pool after a heavy rain. "I think about weeds as opportunistic. If we have a spot that's bare, that's where you're going …