Two trials were conducted to evaluate the effects of herbicide and mulch on weed management and strawberry yield. Napropamide at rates of 4.50, 6.75, or 9.00 kg ai/ha; oxyfluorfen at 0.57 kg ai/ha; and napropamide plus oxyfluorfen at 4.50 plus 0.57 kg/ha were applied pretransplant on pressed beds covered with either low-density polyethylene mulch or virtually impermeable film. There was no herbicide by mulch interaction. Mulch types had no influence on weed counts and fruit yield, whereas herbicides affected both variables. The napropamide plus oxyfluorfen treatment resulted in the highest fruit number and weight, increasing yield by 20% with respect to the nontreated control. This herbicide combination provided the best weed suppression.

Nomenclature: Napropamide; oxyfluorfen; strawberry, Fragaria × ananassa Duch.

Additional index words: Acetamides, crabgrass, diphenylethers, interference, mulch, primrose, ragweed.

Abbreviations: GCREC, Gulf Coast Research and Education Center; WAP, weeks after planting.