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Response of Russet Burbank potatoes to ethephon sprays

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Abstract

Ethephon ((2-chloroethyl)phosphonic acid) was sprayed on the foliage of Russet Burbank potatoes at tuber initiation in four separate field trials over two years. Rates were 0, 61, 122 and 183 g ai/ha. Total yield, yield of U.S. No. 1’s, hollow heart and brown center generally decreased at higher ethephon rates. Yield of undersized tubers increased. Ethephon sprays generally decreased specific gravity but the effect was minor and not consistent. In three of the four plantings where hollow heart and brown center in the untreated controls exceeded 8 t/ha, the low rate of ethephon increased the yield of non-hollow tubers ≥56 g in size.

Compendio

En cuatro ensayos de campo separados, se aplicó durante dos años ethephon ((2-cloroetil) ácido fosfónico) al follaje de papas Russet Burbank, al momento de initiatión de la tuberización. El rendimiento total, rendimiento de U.S. No. 1, corazón vacío y corazón negro disminuyeron generalmente a dosis altas de ethephon. El rendimiento de tubérculos pequeños aumentó. Las aplicaciones de ethephon disminuyeron generalmente la gravedad específica, pero el efecto fué mínimo e inconsistente. En tres de los cuatro campos donde el corazón vacío y corazón negro excedieron en los testigos no tratados las 8 t/ha, las dosis bajas de ethephon incrementaron el rendimiento de tubérculos compactos de ≥56 g en tamaño.

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Scientific Paper No. 7947. College of Agriculture and Home Economics Research Center, Washington State University, Pullman, WA 99164-6240. Project No. 1984. This study supported in part by a grant from the Washington State Potato Commission.

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Koller, D.C., Hiller, L.K. Response of Russet Burbank potatoes to ethephon sprays. American Potato Journal 65, 529–534 (1988). https://doi.org/10.1007/BF02908332

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