Preemergence herbicide delays the critical time of weed removal in popcorn

Barnes Ethann R.; Knezevic Stevan Z.; Lawrence Nevin C.Irmak SuatRodriguez OscarJhala Amit J.

首页> 外文期刊>Weed Technology: A journal of the Weed Science Society of America >Preemergence herbicide delays the critical time of weed removal in popcorn

【24h】

Preemergence herbicide delays the critical time of weed removal in popcorn

机译：Preemergence herbicide delays the critical time of weed removal in popcorn

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Abstract Understanding the critical time of weed removal (CTWR) is necessary for designing effective weed management programs in popcorn production that do not result in yield reduction. The objective of this study was to determine the CTWR in popcorn with and without a premix of atrazine and S-metolachlor applied PRE. Field experiments were conducted at the University of Nebraska–Lincoln, South Central Agricultural Laboratory near Clay Center, NE in 2017 and 2018. The experiment was laid out in a split-plot design with PRE herbicide as the main plot and weed removal timing as the subplot. Main plots included no herbicide or atrazine/S-metolachlor applied PRE. Subplot treatments included a weed-free control, a non-treated control, and weed removal timing at V3, V6, V9, V15, and R1 popcorn growth stages and then kept weed free throughout the season. A four-parameter log-logistic function was fitted to percentage popcorn yield loss and growing degree days separately to each main plot. The number of growing degree days, when 5 yield loss was achieved, was extracted from the model and compared between main plots. The CTWR was from the V4 to V5 popcorn growth stage in absence of PRE herbicide. With atrazine/S-metolachlor applied PRE, the CTWR was delayed until V10 to V15. It is concluded that, to avoid yield loss, weeds must be controlled before the V4 popcorn growth stage when no PRE herbicide is applied, and PRE herbicide, such as atrazine/S-metolachlor in this study, can delay the CTWR until the V10 growth stage.

著录项

来源
《Weed Technology: A journal of the Weed Science Society of America》 |2019年第6期|785-793|共9页
作者
Barnes Ethann R.; Knezevic Stevan Z.; Lawrence Nevin C.Irmak SuatRodriguez OscarJhala Amit J.;
展开▼
作者单位

Graduate Research Assistant, Department of Agronomy and Horticulture, University of Nebraska–Lincoln;

Professor, Northeast Research and Extension Center, Haskell Agricultural Laboratory, University of Nebraska–Lincoln;

Assistant Professor, Panhandle Research and Extension Center, University of Nebraska–LincolnHarold W. Eberhard Distinguished Professor, Department of Biological Systems Engineering, University of Nebraska–LincolnUniversity of Nebraska–LincolnAssociate Professor, Department of Agronomy and Horticulture, University of Nebraska–Lincoln;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类植物保护;
关键词
Aaron Hager; University of Illinois; Atrazine; S-metolachlor; popcorn; Zea mays (L.) var. everta; Critical time for weed removal; growth stage; residual herbicide; weed interference; yield loss;

Preemergence herbicide delays the critical time of weed removal in popcorn

摘要

著录项

相关主题

期刊订阅