The problem is further worsened by the fact that broad-spectrum herbicides like glyphosate can be used on HR crops relatively late in the season after trees have 'leafed out'. A tremendous number of off-target herbicide drift problems on corn have occurred this spring. Corn planted during the warm, dry conditions of early March emerged quickly, and unfortunately, thousands of acres were destroyed by careless burn-down herbicide applications. Corn injury from herbicide application was often documented more than one mile away from the target field. Do not apply any herbicides during conditions conducive to off-target drift.
Extreme caution is required when susceptible crops are downwind.
Increasing acreage of herbicide-tolerant crops may also raise potential for corn injury from herbicide drift during May as well.