20 December 2018 |

New chemistries tested for weed control in corn

Written by melissa.garcia

New chemistries tested for weed control in cornSource: AgriLife Today

While producers may find newer corn herbicides on the market, it is important to look

New chemistries tested for weed control in cornSource: AgriLife Today

While producers may find newer corn herbicides on the market, it is important to look herbicide performance under regional environmental conditions before making any large purchases.

There are many good herbicides on the market, but producers often find that some herbicides perform poorly under stressful Texas High Plains conditions, said Dr. Jourdan Bell, AgriLife Extension agronomist in Amarillo.

Bell said there were many good tank-mix options providing very good control, based on results from this year’s corn herbicide trials near Bushland. However, she reminded producers that coverage is a key component. For corn herbicides, treatments were applied at a rate of 15 gallons per acre.

Another important consideration is the activation requirement of soil-applied herbicides, Bell said. Some chemicals need to be activated with a half-inch rain or irrigation while other herbicides may need up to 1 inch of rain or irrigation; the exact amount of water needed is a function of the herbicide’s water solubility.

While herbicides can be a significant production expense, it is important for producers to recognize the economic return on their herbicide investment, Bell said.

“A successful program generally includes herbicides with residual activities in addition to post-emergence herbicides with several modes of action,” she said. “Having several modes of action along with good coverage allows producers to be more proactive against herbicide-resistant and hard-to-control weeds.”

 

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List of products tested, control levels and rotational intervals

 

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