Ensure Weed-Free Inputs

Seed has the potential to be contaminated with weed seeds, and can become a potential vector for the spread of weed species to new farms and fields. This includes cash crop seed, cover crop seed, and conservation seed mixes. In some cases, herbicide resistant weed seeds have even been transported over several states in this way. Producers can decrease or completely prevent the entry of new weed seeds by careful selection and monitoring of the inputs coming onto the farm. Crop seeds that have passed state certification programs are more likely to be weed-free due to the rigorous weed management requirements for certified seed. Therefore, sticking with only certified seed can help block the entry of new weeds.

Case studies

Spread of Palmer Amaranth through native conservation seed mixes in Iowa:

Iowa Managing Palmer Amaranth in Conservation Plantings

In the News: Stopping the Spread of Palmer Amaranth – Corn and Soybean Digest

Shipment of out-of-state seed mixes introduces new Palmer in Ohio:

In the News: Spread of Palmer Amaranth through Cover Crop Seed in Ohio – Corn and Soybean Digest