Objective(s):
The objective of this workshop is to describe the potential injury to herbaceous and woody horticultural crops from herbicide drift and carryover and to explain how the EPA Drift Reduction Technology program has developed a system to rank spray technologies for drift reduction.

Drift and carry-over injuries, by nature, involve sub-lethal dosing from pre- and post-emergence herbicides. With the development of glyphosate-resistant crops and the quick conversion to these cropping systems, glyphosate was often the herbicide suspected for off-target injury. However, dicamba-resistant soybean and the adoption of this technology to combat glyphosate-resistant weed problems, may cause even more drift injury to off-target horticultural crops. In addition, many herbicides applied to crops or ornamental areas have the potential to persist in soil and to injure desirable vegetation or rotationally grown crops. This workshop will demonstrate the potential injury to herbaceous and woody horticultural plants from herbicide residues that drift off-target or carryover/persist in soil and other materials. The last part of the workshop will demonstrate how the EPA Drift Reduction Technology program encourages the manufacture, marketing, and use of spray technologies scientifically verified to significantly reduce pesticide drift. Initially, the focus of the program was on spray technologies used primarily for pesticide applications to row and field crops by ground or aerial application equipment, but there is hope to expand this program to include technologies for orchard and vineyard crops.