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Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 10/29/2000 Publication Date: 2/2/2001 Citation: Johnson, W.C. 2001. Using narrow row patterns and premium herbicides for cost effective weed control in peanut [abstract]. Weed Science Society of America Abstracts. 41:7. Interpretive Summary: Technical Abstract: Narrow row patterns in peanut production are receiving renewed interest in the southeastern U.S. due to suppression of spotted wilt, widespread planting of bunch-type cultivars that favorably respond to narrow row patterns, and new vacuum planter technologies. An additional benefit is rapid canopy closure, giving peanut planted in narrow row patterns greater competitive ability with weeds than in conventional wide row patterns. Imazapic and diclosulam are premimum herbicides that offer wide weed control spectra, but are more costly and erratic than standard herbicide options. However, these herbicides offer peanut growers the opportunity to simplify weed control. Trials were conducted in 1999 and 2000 in Georgia to determine if enhanced weed suppression in narrow row patterns adds consistency to the performance of premium herbicides and develop an integrated weed management system in peanut using narrow row patterns. Within each row pattern were three levels of weed control intensity, each built around imazapic and diclosulam. Each premium herbicide was applied in a manner based on optimum time of application. Neither row patterns nor premium herbicides consistently affected the parameters evaluated. The only main effect that consistently affected the parameters was weed management intensity. Narrow row patterns had minor effect on weed management in peanut. Weed management intensity with herbicides clearly has the dominant influence on weed incidence and peanut yield. These results also show that intensive weed management system was wasteful of weed control inputs and a properly crafted moderate system was sufficient. |
