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Acetochlor Most Widely Used Pesticide in Minnesota
Minnesota Ag Connection - 05/15/2019

The National Agricultural Statistics Service (NASS) Agricultural Chemical Use Program is the U.S. Department of Agriculture's official source of statistics about on-farm and post-harvest fertilizer and pesticide use and pest management practices.

In the fall of 2018, NASS collected data for the 2018 crop year, the one-year period beginning after the 2017 harvest and ending after the 2018 harvest, about chemical use and pest management practices used on corn and soybean production. The data was collected as part of the Agricultural Resource Management Survey (ARMS) and the results are presented here.

Fertilizer Use: Of the three primary macronutrients, nitrogen (N) was the most widely used on corn. Minnesota farmers applied nitrogen to 96 percent of planted acres at an average rate of 137 pounds per acre per year. Macronutrients phosphate (P) and potash (K) were applied to the majority of acres, at an average rate of 74 and 91 pounds per acre per year, respectively. The secondary macronutrient, sulfur (S), was applied to 37 percent of acres planted to corn.

Pesticide Use: Herbicide active ingredients were applied to 99 percent of the corn acres planted in Minnesota. Acetochlor was the most widely used pesticide overall applied to 63 percent of the planted acres. Acetochlor was also the active ingredient with the greatest total amount applied in Minnesota. Fungicide and insecticide active ingredients were applied to 4 percent and 8 percent of corn acres planted, respectively.

The 2018 Agricultural Chemical Use Survey of soybean producers collected data about fertilizer and pesticide use as well as pest management practices in growing soybeans.

Fertilizer refers to a soil-enriching input that contains one or more plant nutrients, primarily nitrogen (N), phosphate (P2O5), and potash (K2O). Of the three primary macronutrients, potash was the most widely used on soybean acres planted in Minnesota. Farmers applied potash to 36 percent of planted acres at an average rate of 68 pounds per acre per year. Macronutrients nitrogen and phosphate were applied at an average rate of 14 and 46 pounds per acre per year, respectively. The secondary macronutrient, sulfur, was applied to 11 percent of acres planted to soybeans.

The pesticide active ingredients used on soybeans are classified in this report as herbicides (targeting weeds), insecticides (targeting insects), and fungicides (targeting fungal disease). Herbicide active ingredients were applied to 99 percent of the soybean acres planted. Fomesafen sodium and Glyphosate isopropylamine salt were the most widely used pesticides on soybean acres, but glyphosate potassium salt was the active ingredient with the greatest total amount applied. Fungicides and insecticides were applied to 21 and 30 percent of soybean acres planted in Minnesota.

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