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Brookings, SD – Agricultural producers are utilizing different active ingredients on crops to manage weed resistance and crop rotation cycles. The weather can influence their effectiveness and secondary impacts to the current and future crops and surrounding environment. Pesticide drift is the most prevalent cause of injury to growing crops. These injuries may or may not be visually evident.

In a glyphosate drift study in Canada (Acker, 1999), visual injury symptoms in canola did not predict yield loss whereas visual symptoms of wheat and flax could be used to predict yield loss due to pesticide drift. For different active ingredients, the herbicide drift can be detected most often on foliage materials.

Residue degradation may have been slowed in the soil due to cool conditions causing a carryover pesticide situation in a field that is hampering a sensitive crop. Environmental conditions will most likely correct this situation over time, but alternative crops may need to be used for the current cropping season. Herbicide carryover is best assessed in a soil sample.

SGS tests for pesticide residues in soil, plant material and water. Additional herbicides have been added to our screen packages for 2013 which include plant growth regulators, neutral herbicides, sulfonylureas, imidazoles, and clethodim. Individual analysis for glyphosate, glufosinate, flumioxazin, aminopyralid, pyroxsulam, florasulam, cloransulam, flumetsulam, and isoxaflutole is available. Other pesticide tests may be available, so please inquire.

SGS provides a herbicide residue sampling guide to assist the producer, crop consultant and/ or claim specialist in attaining the best sample for the laboratory to utilize in the testing situation. Rose Neal, Pesticide Residue Scientist at the Brookings, SD laboratory, has over 20 years of experience in residue analysis and can assist clients in determining a testing plan for individual situations. Standard turnaround time is 5-10 days, although during the busiest season of July through September turnaround time may increase.

SGS Brookings has the capabilities to assist producers in their soil and plant fertility, plant and seed diseases, as well as contaminants in soil, plant, grains, or feeds.

For more information, contact:

Rose Neal
Analytical Scientist
SGS Brookings
241 34th Avenue Brookings, SD 57006, USA
t: 605-692-7611
e: rose.neal@sgs.com
www.sgs.com/us-analytical