As farmers gain resistant weeds and lose the effectiveness of herbicides, they cannot afford any escapes because that escape could be resistant. Therefore, the weed control goal should be zero tolerance.
Herbicide Summit II demonstrated key leadership in the Weed Science Society of America and various federal agencies in Washington “get it” herbicide-resistant weeds pose a major threat to agriculture globally.
Even before Roundup Ready crops Arkansas farmers were moving away from residual herbicides to more total postemergence weed control programs. The big reason was due to the erratic nature of residual herbicides.
The complaints about herbicide drift run the gamut — drift from an adjacent field, drift from long distances, temperature inversion issues, plane getting in the wrong field, farmer getting his own fields mixed up, contamination in the load, carryover.