Hydrothol as a Vine Desiccant of ‘Atlantic’ Potatoes

A. Pavlista
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引用次数: 5

Abstract

ABSTRACT Desiccating potato (Solanum tuberosum L.) vines using herbicides is a common practice but current desiccants are not satisfactory. The objective of this study was to evaluate hydrothol, the mono-amine salt of endothall, as a vine desiccant on ‘Atlantic’ potato. Hydro-thol was applied at 0.56 to 1.68 Kg ai/ha, endothall at 1.12 Kg ai/ha and diquat at 0.28 Kg ai/ha. Split applications of hydrothol were compared to single doses. Subjective evaluations were made on regrowth and tuber skinning, and objective measurements of specific gravity and yield were measured. Trials were conducted from 1991 to 1995 at Scottsbluff, NE. The optimal rate of hydrothol was 1.12 Kg/ha for leaf desiccation but was no more effective than endothall or diquat at their standard rates. There was a linear dose response for stem desiccation, but the highest hydrothol rate, 1.68 Kg/ha, was less effective than endothall. None of the hydrothol rates improved tuber skinning over endothall or diquat. Regrowth after hydrothol treatment was similar to the check and diquat, but endothall stimulated regrowth more than other treatments. Rates of hydrothol below 1.68 Kg/ha, endothall and diquat did not adversely affect specific gravity of harvested tubers, and there was no significant effect on yields. Split applications of hydrothol resulted in slower leaf desiccation than single applications, and stem desiccation was greater with a single application of hydrothol than with split applications. The addition of ammonium sulfate, 11.2 Kg/ha, to hydrothol at 1.12 to 1.68 Kg/ha increased stem desiccation but also increased regrowth. Although hydrothol may be used as a vine desiccant, the addition of ammonium sulfate may be needed to achieve a level of commercially acceptable activity.
水酚作为“大西洋”马铃薯的葡萄藤干燥剂
使用除草剂干燥马铃薯(Solanum tuberosum L.)葡萄藤是一种常见的做法,但目前的干燥剂并不令人满意。本研究的目的是评价氢醇和单胺盐在“大西洋”马铃薯上作为葡萄干燥剂的作用。氢醇用量为0.56 ~ 1.68 Kg ai/ha,内吸量为1.12 Kg ai/ha, diquat用量为0.28 Kg ai/ha。将分次使用的水酚与单次使用的水酚进行了比较。对再生和块茎剥皮进行了主观评价,对比重和产量进行了客观测量。试验于1991年至1995年在新英格兰的Scottsbluff进行。以1.12 Kg/ hm2为最适剂量的水酚对叶片的干燥效果不优于以标准剂量的内唑和迪奎特。茎干脱水的剂量呈线性响应,但最高的水酚率为1.68 Kg/ha,效果不如腔内处理。与内管或双管相比,没有任何一种水酚浓度改善块茎剥皮。乙醇处理后的再生与对照和diquat相似,但腔内处理比其他处理更能促进再生。水酚用量低于1.68 Kg/ hm2,对收获块茎比重无不利影响,对产量无显著影响。分次施用水酚导致叶片干燥比单次施用慢,而单次施用水酚导致茎干燥比分次施用更大。在1.12 ~ 1.68 Kg/ha的氢醇基础上添加11.2 Kg/ha的硫酸铵,增加了茎干性,但也增加了再生。虽然水酚可以用作葡萄干燥剂,但为了达到商业上可接受的活性水平,可能需要添加硫酸铵。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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