Abbott, 2017
Chuck Abbott, “Arkansas Task Force Aims for Long-Term Recommendations on Use of Dicamba,” The Fern, August 9, 2017.
SUMMARY:
Arkansas has appointed a 21-member task force to help identify solutions for the dicamba drift damage problem, with 900 complaints received this year so far. FULL TEXT
EPA, 1999a
Environmental Protection Agency, “Dicamba (3,6-dichloro-o-anisic acid); Pesticide Tolerance,” 40 CFR Part 180, Federal Register, January 6, 1999, Vol. 64, No. 3.
SUMMARY:
Updates tolerances for dicamba. FULL TEXT
DuPont, 2015
DuPont, FeXapan Herbicide Label, July 23, 2015, EPA Registration Number 352-913.
SUMMARY:
First label for BASF FeXapan Herbicide containing DGA dicamba and inert ingredients intended to reduce volatility and drift. FULL TEXT
Gray, 2017b
Bryce Gray, “Reports of crop damage resurfacing since Missouri dicamba ban lifted,” St Louis Post-Dispatch, August 4, 2017.
SUMMARY:
Reports that the dicamba ban in Missouri was lifted in Mid-July and farmers had resumed spraying. Damage reports are re-occurring. One farmer quoted in the story compares his Missouri acres where “every acre” is showing damage to his healthy soybean fields in neighboring Arkansas that has a similar dicamba ban in place. Some places showing damage are at least a mile away from any possible source of dicamba. Missouri’s ban was in place for less than a week after stricter conditions rules for spraying dicamba were issued targeting wind speed and the time of application. Monsanto is based in Missouri and some questioned the role their political power played in the lifting of the ban. FULL TEXT
Parker, 2017
Mario Parker, “Pesticide ‘Drifting’ Wreaks Havoc Across U.S. Crops,” Bloomberg, August 1, 2017.
SUMMARY:
Bloomberg reports on the dicamba damage numbers. Article includes key information from Monsanto about number of acres planted in dicamba-resistant soybeans (20 million) and cotton (5 million) in 2017. This represents about 25% percent of the national soybean crop and about half of the cotton crop, very significant numbers. FULL TEXT
Bradley, 2017a
Kevin Bradley, July 25, 2017, “Ag Industry, Do we have a problem yet?,” Integrated Pest and Crop Management, University of Missouri.
SUMMARY:
Article summarizes the total number of dicamba-related drift complaints as 1,411 as of July 19, 2017. Arkansas leads with 686 complaints, while Missouri has over 200. Estimates of acres damaged are up to 2.5 million. The author asks: “does 1,411 official dicamba-related injury investigations and/or approximately 2.5 million acres of dicamba-injured soybean constitute a problem for U.S. agriculture? …[M]y answer is an emphatic yes.” FULL TEXT
EPA, 1999b
Environmental Protection Agency, “Permanent Group 1 Tolerances By Pesticide,” August 3, 1999.
SUMMARY:
Sets tolerances for pesticides after the passage of the FQPA. FULL TEXT
EPA, 1999c
Environmental Protection Agency, “Reassessed Group 2 Tolerances by Pesticide,” August 4, 1999.
SUMMARY:
Reassessed tolerances for pesticides following the passage of the FQPA. FULL TEXT
EPA, 2000
Environmental Protection Agency, 40 CFR Parts 180, 185, and 186, “Consolidation of Certain Food and Feed Additive Tolerance Regulations,” Federal Register, Vol. 65, No. 101, May 24, 2000.
SUMMARY:
The Office of Pesticide Programs is transferring certain of the pesticide food and feed additive regulations that are now in 40 CFR parts 185 and 186 to part 180. These regulations are being consolidate because as a matter of law all of the
pesticide tolerances are now considered to be regulated under FFDCA section 408 as amended by the Food Quality
Protection Act (Public Law 104–17) and they no longer need to be separate. Includes dicamba tolerances. FULL TEXT
Coupe et. al, 2012
Richard H Coupe, Stephen J Kalkhoff, Paul D Capelc, and Caroline Gregoired, “Fate and transport of glyphosate and aminomethylphosphonic acid in surface waters of agricultural basins,” Pest Management Science, 2012, 68:1, 16-30, DOI: 10.1002/ps.2212.
ABSTRACT:
BACKGROUND: Glyphosate [N-(phosphonomethyl)glycine] is a herbicide used widely throughout the world in the production of many crops and is heavily used on soybeans, corn and cotton. Glyphosate is used in almost all agricultural areas of the United States, and the agricultural use of glyphosate has increased from less than 10 000 Mg in 1992 to more than 80 000 Mg in 2007. The greatest intensity of glyphosate use is in the midwestern United States, where applications are predominantly to genetically modified corn and soybeans. In spite of the increase in usage across the United States, the characterization of the transport of glyphosate and its degradate aminomethylphosphonic acid (AMPA) on a watershed scale is lacking.
RESULTS: Glyphosate and AMPA were frequently detected in the surface waters of four agricultural basins. The frequency and magnitude of detections varied across basins, and the load, as a percentage of use, ranged from 0.009 to 0.86% and could be related to three general characteristics: source strength, rainfall runoff and flow route.
CONCLUSIONS: Glyphosate use in a watershed results in some occurrence in surface water; however, the watersheds most at risk for the offsite transport of glyphosate are those with high application rates, rainfall that results in overland runoff and a flow route that does not include transport through the soil. FULL TEXT