Note Sent to Duplin County Peanut Folks

— Written By

E-Mail Sent from Curtis Fountain to peanut folks in Duplin County

To: Duplin Co. Peanut Interests

From: Curtis D. Fountain, Agricultural Extension Agent – Field Crops

From ground crack to 28 days after ground crack, paraquat* + bentazon* offer broad-spectrum early postemergence weed/grass control. For best results, weeds/grasses should be 2 inches or less.

For paraquat 2.0 lb/gal formulations, the rate is 8 ounces/acre. For paraquat 3.0 lb/gal formulations, the rate is 5.4 ounces/acre. For bentazon 4 lb/gal formulations, the rate is 8 ounces/acre. One pint of nonionic surfactant per 100 gallons of spray solution should be added.

S-metolachlor* or metolachlor* or acetochlor* or dimethenamid* may be included in the above tankmix for residual grass/pigweed control. This inclusion adds another layer of residual herbicide for problem grass/pigweed fields. For Dual Magnum, the rate is 1 pint/acre. For Warrant, the rate is 3 pints/acre. For Outlook, the rate is 1 pint/acre. Do not apply more than 2.6 pints of Dual Magnum, 8 pints of Warrant, or 21 ounces of Outlook per acre per season.

For thrips management, consider a foliar application of acephate* 2 weeks after ground crack. Remember slow plant growth conditions favor thrip plant stunting. If live thrips/thrips injury is present, acephate can be added to the herbicide tankmix as well. For acephate 90-97S formulations, the rate is 6-12 ounces/acre. For acephate 75S formulations, the rate is 8-16 ounces/acre.

If plants are severely stunted due to thrips, paraquat treatments are not recommended.

Thanks.

*
paraquat (Gramoxone, Firestorm, Parazone, etc.)
bentazon (Basagran, etc.)
S-metolachlor (Dual Magnum, etc.)
metolachlor (Stalwart, etc.)
acetochlor (Warrant)
dimethenamid (Outlook)
acephate (Orthene, etc.)

Article first appeared as North Carolina Peanut Note (PNNC-2014-050)