Alessandra C. Francischini, J. Constantin, Willian D. Matte, Rubem S. Oliveira Jr., Fellipe G. Machado, Felipe K. Morota
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引用次数: 2
Abstract
Information about the residual activity of herbicides sprayed in the control of cotton stalks and its potential to affect the development and productivity of corn sown in the following crop are limited. The objective of this work was to identify the carryover effect promoted by the single and sequential application of herbicides used in the control of cotton stalks and to estimate the plant-back for corn sowing. Two trials were carried out simultaneously in a greenhouse, one for a single application and one for a sequential application of herbicides treatments. It was used a 15 x 5 factorial scheme, in a randomized block design with four replicates. The first factor was composed of herbicide treatments and the second factor of five sowing seasons after the application (0, 30, 60, 90 and 120 days). The experimental plots were composed of plastic pots with a capacity of 3 dm filled with loamy soil (470 g kg clay), dried and sieved. The herbicides sprayed were 2,4-D, glyphosate, saflufenacil, [imazapic + imazapyr], dicamba, fluroxypyr, and sulfentrazone. The sequential application of most treatments provided an increase in the residual activity of the evaluated herbicides. The 2,4-D (1,340 g ha), 2,4-D + glyphosate (1,340 + 720 g ha) and 2,4-D + glyphosate + saflufenacil (1,340 + 720 + 105 g ha) presented the shortest safety intervals and were those that presented the lowest risk of affecting the corn sown in succession, even in sequential applications. However, the treatments that consisted of association with herbicides with higher residual activity in the soil such as dicamba, fluroxypyr, sulfentrazone and [imazapic + imazapyr], presented higher carryover potential for corn crop, being observed a safety interval greater than 94 days after sequential application of
在棉花秸秆控制中喷洒的除草剂残留活性及其对后续作物中播种的玉米发育和生产力的潜在影响的信息有限。本研究的目的是确定单次和连续施用除草剂对棉秆控制的携带效应,并估计玉米播种时的植株回潮。在温室中同时进行了两项试验,一项是单次施用,另一项是连续施用除草剂。采用15 x 5因子方案,随机区组设计,共4个重复。第一因子由除草剂处理组成,第二因子由施用后5个播种季节(0、30、60、90和120 d)组成。试验田由容量为3公克的塑料盆组成,罐内填满壤土(470克千克粘土),晾干并筛分。喷洒的除草剂为2,4- d、草甘膦、氟虫腈、伊马唑吡酯+伊马唑吡酯、麦草畏、氟虫腈和磺胺曲酮。大多数处理的顺序施用都增加了所评价除草剂的残留活性。2,4- d (1,340 g ha)、2,4- d +草甘膦(1,340 + 720 g ha)和2,4- d +草甘膦+氟虫腈(1,340 + 720 + 105 g ha)的安全间隔最短,对玉米连续播种的影响风险最低,即使是连续施用。然而,与土壤中残留活性较高的除草剂(如麦草畏、氟虫腈、磺胺曲酮和[imazapic + imazapyr])联合使用的处理对玉米作物具有更高的携带潜力,连续施用后的安全间隔大于94天
Planta DaninhaAgricultural and Biological Sciences-Plant Science
自引率
0.00%
发文量
0
审稿时长
16 weeks
期刊介绍:
Planta Daninha is a scientific journal published by the Brazilian Society of Weed Science (SBCPD - Sociedade Brasileira da Ciência das Plantas Daninhas). Papers submitted for publication must be sent through an electronic system, on http://www.scielo.br/pd. Works may be written in Portuguese, English, or Spanish, and will be accepted after being reviewed and approved by the Editorial Board. Only papers that have not been published or submitted for publication in other media will be accepted. Articles in Portuguese will be translated to English after being properly corrected and authorized by the authors. Planta Daninha has with goal to publish genuine technical-scientific papers and literature reviews from a critical perspective on Biology, weed management, and related topics.