Summary
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1.
Royal Kidney and Up-to-date varieties were sprayed with 2,000, 3,000, 4,000 and 5,000 ppm of Maleic hydrazide (MH 40) 80 and 90 days after planting.
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2.
Potatoes sprayed with 5,000 ppm MH 40 produced an insignificantly higher yield than the control or other concentrations of MH.
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3.
Weight loss of Royal Kidney decreased during 7 months at 80–90 F storage as the concentration of MH was increased, whereas with Up-to-date, weight loss increased as concentration of MH increased.
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4.
Time of application, 80 and 90 days after planting, had no significant effect on yield but weight losses in storage were less when sprayed 90 days after planting.
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5.
Weight loss under refrigerated storage (55 F) were much lower for all treatments including controls than under unrefrigerated storage.
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6.
Under refrigerated storage weight losses in Royal Kidney increased slightly as MH concentration was increased, whereas, in Up-to-date weight losses decreased slightly as MH concentration increased.
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7.
MH sprays, 2000 to 5000 ppm applied 80 and 90 days after planting had no adverse effect on tuber shape.
Resumen
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1.
Las variedades Royal Kidney y Up-to-date fueron rociadas con 2,000, 3,000, 4,000 y 5000 ppm de HNCOCH:CHCONH (Maleic hydrazide (MH 40), a los 80 y 90 días después de sembradas.
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2.
Papas rociadas con 5000 ppm de MH 40 produjeron rendimientos insignificantemente mayores, que los obtenidos con el control o con otras concentraciones de MH.
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3.
La pérdida de peso de Royal Kidney durante 7 meses de almacenamiento a 80–90 F, disminuyó a medida que la concentración de MH era aumentada; mientras que con Up-to-date, la pérdida de peso aumentó, a medida que la concentración de MH aumentaba.
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4.
El tiempo de aplicación, a los 80 y 90 días después de sembradas, no tuvo ningún efecto signigicante en el rendimiento, pero las pérdidas de peso durante el almacenamiento fueron menores cuando rociadas a los 90 días despues de sembradas.
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5.
Las pérdidas de peso bajo almacenamiento refrigerado (55 F) fueron mucho menores que bajo almacenamiento no refrigerado, para todos los tratamientos incluyendo los controles.
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6.
Bajo almacenamiento refrigerado, las pérdidas de peso en Royal Kidney aumentaron ligeramente a medida que la concentración de MH fue aumentada, mientras que en Up-to-date, las pérdidas de peso, disminuyeron ligeramente a medida que las concentraciones de MH aumentaron.
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7.
Las rociadas de MH de 2000 a 5000 ppm aplicadas a los 80 y 90 dias después de sembradas, no tuvieron ningún efecto desfavorable en la fórma de los tubérculos.
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Literature Cited
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Potatoes and Crop Research, Department of Agriculture, West Bengal, Calcutta, India.
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Choudhuri, H.C. Effects of maleic hydrazide on yield and storage of potatoes in West Bengal. American Potato Journal 44, 123–127 (1967). https://doi.org/10.1007/BF02862910
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DOI: https://doi.org/10.1007/BF02862910