Abstract
Norchip potatoes were evaluated for yield, tuber maturity, and processing quality after a pre-harvest field application of the plant growth regulator, mefluidide {N-[2,4-dimethyl-5-[ [(trifluoromethyl)sulfonyl]amino]phenyl]-acetamide}. Mefluidide applied four to six weeks prior to harvest resulted in tubers with slightly higher, though generally insignificant, sucrose concentration compared to tubers from untreated plants. No yield differences were found among treatments. Application of up to 1.0 kg ai/ha mefluidide usually resulted in a small non-significant increase in tuber specific gravity. In one of the three years of testing, chip color improved with increasing mefluidide rates up to 1.0 kg ai/ha. Increased tuber periderm development and russeting resulted from increasing concentrations of mefluidide.
Compendio
Se evaluó papa Norchip para rendimiento, madurez del tubérculo y calidad de procesamiento después de una aplicación de campo, antes de la cosecha, del regulador de crecimiento mefluidide {N[2.4-dimetil-5-[ [ (trifluorometil) sulfonil] amino] fenil] -acetamida}. El mefluidide aplicado cuatro a seis semanas antes de la cosecha dió como resultado tubérculos con una ligeramente mayor, aunque generalmente insignificante concentración de sacarosa, en comparación con tubérculos provenientes de plantas no tratadas. No se encontraron diferencias de rendimiento entre los tratamientos. La aplicación de hasta 1.0 Kg ia/ha de mefluidide dió generalmente como resultado un incremento pequeño no significativo de la gravedad específica del tubérculo. Con dosis crecientes de mefluidide que llegaron hasta 1.0 kg ia/ha mejoró el color de las hojuelas en uno de los tres años de prueba. El incremento en las concentraciones de mefluidide dió como resultado un incremento del color rojizo y desarrollo del peridermo.
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Contribution No. 753, Department of Plant Science, University of Manitoba, Winnipeg, Manitoba, R3T 2N2.
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Siemens, A.J., Pritchard, M.K. & Zulu, G.M. Mefluidide effects on field performance and processing quality of Norchip potatoes. American Potato Journal 66, 75–82 (1989). https://doi.org/10.1007/BF02854426
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DOI: https://doi.org/10.1007/BF02854426