Herbicide dose and incorporation depth in combination with 1,3-dichloropropene plus chloropicrin for Cyperus rotundus control in tomato and pepper
2004
Gilreath, J.P. | Santos, B.M.
Field trials were conducted to compare the efficacy of various herbicides in combination with 1,3-dichloropropene plus chloropicrin (C-17) on Cyperus rotundus (purple nutsedge) control and their effect on tomato and pepper yields, and to determine the appropriate herbicide application depth in the soil for purple nutsedge control in polyethylene-mulched tomato and pepper fields. The various chemical treatments were incorporated into the soil. High doses and deep incorporation of napropamide and metolachlor provided the best weed control. Tomato data revealed that although C-17 reduced purple nutsedge density, the fumigant alone was insufficient to avoid tomato yield losses. Therefore, adding an herbicide to enhance purple nutsedge control is necessary. In pepper, yield improved as purple nutsedge density declined with the application of C-17 alone, indicating that for the purple nutsedge density present, C-17 alone could effectively reduce pepper yield losses.
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