Growers struggling with glyphosate resistance can turn to Interline™, a generic glufosinate. It’s another option in the fight against tough weeds, according to Tim Stelter, manager at Federated’s Osceola location. It can be used as part of the LibertyLink® soybean system.

Glufosinate (not to be confused with glyphosate) has no weed resistance “yet,” Stelter noted, highlighting the fact that glufosinate and glyphosate are different technologies, have different traits, and act very differently as herbicides.

“Interline is similar to Liberty,” but at a lower price point, said Stelter, adding, “it’s a contact herbicide so you need good coverage on the plant. It doesn’t translocate.”

Glufosinate will kill waterhemp and giant ragweed, but it needs to be sprayed (“ideally”) when weeds are no more than two to three inches tall. Stelter cautioned that “glufosinate is a little weak on lambsquarters and volunteer corn,” based on many observations in the field.

Because glufosinate is a contact herbicide, proper nozzles and a sufficient volume of water (20 gal./ac.) are critical for good coverage. The nozzle of choice is an extended range flat fan nozzle that produces an application rate of 15-20 gal. of product per acre. (See Interline label.) Interline also needs a surfactant to get all the benefits of the product. Legion is a specifically designed adjuvant to be used with Interline. (See Legion info.)

It should be noted that the LibertyLink soybean system requires 3 lb./ac of ammonium sulfate (AMS) whether Liberty or Interline is used.

Glufosinate can be tank mixed with some other herbicides, but not glyphosate,” Stelter emphasized. It can be paired with a pre- or post-emerge herbicide or used alone.

Discuss your weed challenges with your Federated Agronomist to determine if Interline is a good option for your farm.