Germination ecology and response to herbicides of Ludwigia prostrata and their implication for weed control in paddy fields

IF 1.3 3区农林科学 Q3 AGRONOMY

Weed Technology Pub Date : 2023-04-01 DOI:10.1017/wet.2023.34

Tao Li, Huawei Qian, Guohui Yuan, Jiequn Fan, Shuiliang Guo

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Abstract

Abstract Prostrate water primrose is a troublesome weed in rice paddy fields. A study was conducted to determine the influence of environmental and agronomic factors on its emergence. The efficacy of herbicides on this species was also examined. The germination percentage of mature seeds remained above 90% within 180 d after harvest, indicating a low primary dormancy of this species. Light stimulated seed germination. Seeds buried deeper than 0.5 cm did not form seedlings. These results suggest that stale seedbed practices and deep tillage operations can mitigate the occurrence of this species in paddy fields. The optimum temperature for germination varied from 25/15 C to 35/25 C. The osmotic potential and salt concentration needed to inhibit 50% of maximum germination were –0.4 MPa and 197 mM, respectively. Seeds were tolerant to flooding and did not germinate at pH 8 to 10. The preemergence herbicides oxadiazon, oxadiargyl, and butachlor had excellent control efficacy on prostrate water primrose, with a 95.4% to 100% reduction in seedling number and a 99.2% to 100% reduction in biomass, respectively. The postemergence herbicides MCPA-Na + bentazone, bentazone, MCPA-Na, and fluroxypyr applied at the 2- to 3-leaf stage of prostrate water primrose provided a 90.6% to 100% reduction in seedling number and a 99.3% to 100% reduction in biomass. The results of this study can help in developing sustainable and effective integrated weed management strategies for controlling prostrate water primrose in paddy fields. Nomenclature: Bentazon; butachlor; fluroxypyr; MCPA-Na; oxadiargyl; oxadiazon; prostrate water primrose; Ludwigia prostrata Roxb

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匍匐路德维希的发芽生态、对除草剂的响应及其对稻田杂草控制的意义

摘要报春花是稻田中一种常见的杂草。进行了一项研究，以确定环境和农艺因素对其出现的影响。除草剂对该物种的效力也进行了检验。成熟种子的发芽率在收获后180天内保持在90%以上，表明该物种的初级休眠较低。光刺激种子发芽。埋深超过0.5厘米的种子没有形成幼苗。这些结果表明，陈旧的苗床做法和深耕作业可以减少该物种在稻田中的发生。发芽的最适温度为25/15 C至35/25 C。抑制50%最大发芽所需的渗透势和盐浓度分别为-0.4 MPa和197 mM。种子耐淹水，在pH8-10时不发芽。孕前除草剂恶二唑、草二唑和丁草胺对匍匐报春花具有良好的防治效果，幼苗数量减少95.4%至100%，生物量减少99.2%至100%。在匍匐报春花2-3叶期施用出苗后除草剂MCPA-Na+bentazone、bentazonne、MCPA-Na和氟氧吡，使幼苗数量减少90.6%至100%，生物量减少99.3%至100%。本研究的结果有助于制定可持续有效的杂草综合管理策略，以控制稻田中的匍匐报春花。命名法：Bentazon；丁草胺；氟氧吡；MCPA-Na；恶二芳基；恶二唑；匍匐的报春花；路德维希

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来源期刊

Weed Technology 农林科学-农艺学

CiteScore

2.90

自引率

21.40%

发文量

审稿时长

12-24 weeks

期刊介绍： Weed Technology publishes original research and scholarship in the form of peer-reviewed articles focused on understanding how weeds are managed. The journal focuses on: - Applied aspects concerning the management of weeds in agricultural systems - Herbicides used to manage undesired vegetation, weed biology and control - Weed/crop management systems - Reports of new weed problems -New technologies for weed management and special articles emphasizing technology transfer to improve weed control -Articles dealing with plant growth regulators and management of undesired plant growth may also be accepted, provided there is clear relevance to weed science technology, e.g., turfgrass or woody plant management along rights-of-way, vegetation management in forest, aquatic, or other non-crop situations. -Surveys, education, and extension topics related to weeds will also be considered