Biology and Pest Management of the Sunflower Beetle in North Dakota

E-82

North Dakota Small Grain Insects: Cereal Leaf Beetle

E-123

Soybean aphid, aphis glycines, management in North Dakota

E-123

Aphid management in small grains, corn and sorghum

E-493(Revised

Corn Insects of North Dakota Affecting the Crop after Emergence

E-63

Grasshopper Biology and Management

E-27

Lygus Bugs in Sugarbeets

E-128

Biological Control of Insect and Weed Pests in North Dakota Agriculture

E-122

Biology and Pest Management of the Sunflower Beetle in North Dakota

E-82

Biology and Economics of Recommendations for Insecticide-Based Management of Soybean Aphid

Soybean aphid, Aphis glycines Matsumura, remains the key insect pest of soybean, Glycine max (L.) Merrill, in the north-central United States. Management of this pest has relied primarily on scouting and application of foliar insecticides based on an economic threshold (ET) of 250 aphids per plant. This review explains why this ET remains valid for soybean aphid management, despite changes in crop value and input costs. In particular, we review how soybean aphid impacts soybean yield, the role of biology and economics in recommendations for soybean aphid management, and the short- and long-term consequences of inappropriately timed insecticide applications