Effects of Stand Loss, Planting Date, and Replanting Method on Yield and Quality of Flue-cured Tobacco

planting date;replanting method;stand loss;tobacco;tomato spotted wilt

Wilkinson, William Charles ; Dr. David L. Jordan, Committee Member,Dr. Loren R. Fisher, Committee Chair,Dr. W. David Smith, Committee Member,Dr. Thomas A. Melton, Committee Member,Wilkinson, William Charles ; Dr. David L. Jordan ; Committee Member ; Dr. Loren R. Fisher ; Committee Chair ; Dr. W. David Smith ; Committee Member ; Dr. Thomas A. Melton ; Committee Member

University:North Carolina State University

关键词: planting date;    replanting method;    stand loss;    tobacco;    tomato spotted wilt;   

Others  :  https://repository.lib.ncsu.edu/bitstream/handle/1840.16/2189/etd.pdf?sequence=1&isAllowed=y

美国|英语

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【 摘 要 】

In 2002, early season infections of tomato spotted wilt (TSW) caused significant stand losses and more than a 6% overall crop loss in flue-cured tobacco in North Carolina.Research was conducted at one location in 2003 and two locations in 2004 to evaluate the effects of stand loss, planting date, and replanting method on flue-cured tobacco yield and quality.Stand loss treatments included a 10, 20, 30, and 40% stand loss, two and four weeks after transplanting.A TSW loss simulation consisting of a 10 %, 10 %, and 20 % stand loss at 3, 4, and 5 weeks after transplanting, respectively, was also included.Planting date treatments included planting at the normal transplanting date and 2, 3, 4, and 5 weeks after the normal transplanting date.To evaluate the effects of replanting method tobacco was also replanted at 2 an 4 weeks after normal on an existing row ridge, a re-bedded row ridge, and a tilled and re-bedded row ridge. Due to excessive rainfall, stand loss and planting date had no effect on yield or quality in 2003.In 2004, the TSW stand loss simulation reduced yield at one location, but no other stand loss treatment differences were observed.Delaying transplanting by 5 weeks at one location and by 4 or 5 weeks at one location reduced yield, but did not affect quality.Replanting treatments reduced yields compared to the respective delayed transplanting date in 2003, but did not affect quality.Yield and quality were not consistently affected by replanting method in 2004 when compared to the respective delay in transplanting. Because stand losses from TSW are gradual, by the time stand losses reach the levels that significantly reduced tobacco yield in this research, yield loss associated with the late planting date would prohibit replanting from being a viable management option in most seasons.