Nightshade, Eastern black

Images: Virginia Tech University

Eastern black nightshade is found in many states east of the Rocky Mountains, and it is an agronomic problem in the midwest, mid-south, and mid-Atlantic. This summer annual germinates from May-July in the midwest. While it can reduce soybean yield, it is also known for clogging combines during harvest, and reducing soybean quality. Seeds can germinate after post-emergence applications. Cultural and chemical practices may be integrated to manage this weed: a preplant herbicide mix with residual control is the best chemical option to prevent mid-season bursts. Along with effective herbicide applications, decreasing the crop row spacing can be used to reduce eastern black nightshade growth and seed production.

Herbicide resistant populations:

  • Group 2 (ALS)
  • Group 5 (triazines)

Locations of resistant populations:

Illinois, Michigan, North Dakota, Wisconsin

Resources:

Eastern Black Nightshade Management in Soybean and Corn – University of Missouri

Management of Eastern Black Nightshade in Agronomic Crops (an Integrated Approach) – Penn State University

Eastern Black Nightshade Identification