Can you apply Extract PBA with pre-emerge herbicide up to V11 in corn?
Extract PBA should not be applied to the corn seedling post emergence. Post-emergent sprays with Extract PBA have the potential to burn a grass crop like corn due to the ammonium thiosulfate (ATS) in the product. However, Extract PBA can be included with post-plant pre-emerge herbicide sprays on corn. It can also be used in UAN sidedress applications to make the sidedress nitrogen more efficient.