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Timing Defoliation Applications for Maximum Yields and Optimum Quality in Cotton Containing a Fruiting Gap

Joel C. Faircloth*,a, Keith L. Edmistenb, Randy Wellsc and Alexander M. Stewartd

a LSU AgCenter, Northeast Region, 212-B Macon Ridge Rd., Winnsboro, LA 71295
b North Carolina State University, P.O. Box 7620, Raleigh, NC 27695
c North Carolina State University, P.O. Box 7620, Raleigh, NC 27695, Department of Crop Science, North Carolina State Univ., Raleigh, NC 27695-7620
d LSU AgCenter, Dean Lee Research Station, 8305 East Campus Avenue, Alexandria, LA 71302-9306



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Fig. 1. Relationship between yield and time of defoliation based on various open boll percentages at defoliation (OBPD) for each gap type in 3 yr at Clayton, NC. Each data point represents yield at a particular OBPD in an individual plot. * Slope of the gap and no gap treatments for that year are significantly different from each other. Fisher's Protected LSD, p ≤ 0.05.

 


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Fig. 2. Relationship between micronaire and time of defoliation based on various open boll percentage at defoliation (OBPD) for each gap type over 3 yr at Clayton, NC. Each data point represents micronaire values from at a particular OBPD measured in an individual plot at harvest. * Slope of the gap and no gap treatments for that year are significantly different from each other. Fisher's Protected LSD, p ≤ 0.05.

 





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