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