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ARS Home » Northeast Area » Beltsville, Maryland (BARC) » Beltsville Agricultural Research Center » Sustainable Agricultural Systems Laboratory » Research » Research Project #418954

Research Project: Managing Cover Crop-herbicide Interactions to Improve Herbicide Efficacy

Location: Sustainable Agricultural Systems Laboratory

Project Number: 8042-22000-166-22-I
Project Type: Interagency Reimbursable Agreement

Start Date: Apr 1, 2018
End Date: Mar 31, 2021

Objective:
Objective 1: Quantify synergistic impact of rye residues and herbicides on weed seedling growth and survival under controlled environment and field conditions. Objective 2: Elucidate physiological impact of rye residues on herbicide metabolism of weed seedlings.

Approach:
SASL will conduct controlled environment and field studies (Urbana, IL, and Beltsville, MD) of the independent and combined effects of soil incorporated rye residues and S-metolachlor on the growth and survival of Amaranthus retroflexus and Amaranthus tuberculatus seedlings. Within greenhouse studies only, we will quantify the dose response of Amaranthus spp. mortality to S-metolachlor in soils with and without rye amendment. Finally, we will use standard herbicide metabolism laboratory procedures to determine whether shifts in S-metolachlor dose response of Amaranthus seedlings is due to altered detoxification, altered translocation or another mechanism.