Influence of Palmer Amaranth Density on Peanut Water Use

Institution:

University of Florida

Budget ID:

1247

Project ID:

391

Report BID:

State:

Florida

Region:

Southeast (GA, FL, AL)

State Group:

FL-89

Project Fiscal Year:

2013

Category:

Pest/Disease

Report Type:

Report Received Date:

Investigator:

Ferrell

Project NPB Budget:

$10,000

Palmer amaranth continues to be one of the most troublesome weeds in the southeast (Webster 2009). Peanut yield loss of 28% due to Palmer amaranth competition has been shown to result from 1 Palmer amaranth plant per meter 
(Burke et al. 2007). Although this weed has the potential to devastate peanut yield, numerous research trials have shown that timely application ofpreemergence herbicides can effectively manage this weed (Dotray et al. 1996, Sweat et al. 1998, Bond et al. 2006). The limitation of this program is that rainfall or irrigation is necessary to activate these herbicides. With approximately 30% of peanut irrigated in FL, a dry spring can result in preemergence herbicide failures. 

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