Ramandeep Kaur, Nevin C. Lawrence, Yeyin Shi, Parminder S. Chahal, Stevan Z. Knezevic, Amit J. Jhala
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Flufenacet/isoxaflutole/thiencarbazone-methyl followed by (fb) glufosinate, acetochlor/mesotrione applied pre-emergence (PRE) or fb glufosinate, acetochlor/clopyralid/flumetsulam fb glufosinate, and glufosinate fb dicamba/tembotrione controlled Palmer amaranth ≥90% at 90 days after late post-emergence (DALPOST) herbicide application. Glufosinate fb dicamba/tembotrione and acetochlor/mesotrione fb glufosinate with 38- and 76-cm row spacing, flufenacet/isoxaflutole/thiencarbazone-methyl fb glufosinate, and acetochlor/clopyralid/flumetsulam fb glufosinate with 38-cm row spacing recorded no Palmer amaranth 30 DALPOST. Herbicide programs with narrow row spacing had numerically higher PAR interception compared with 76-cm row spacing 30 days after early post-emergence (DAEPOST) and 15 DALPOST. Higher corn yield (13,222–13,596 kg ha<sup>−1</sup>) was obtained with acetochlor/clopyralid/flumetsulam fb glufosinate with 38-cm row spacing. Palmer amaranth seed production was zero with acetochlor/mesotrione fb glufosinate, and glufosinate fb dicamba/tembotrione; flufenacet/isoxaflutole/thiencarbazone-methyl fb glufosinate in 76-cm row spacing; and acetochlor/clopyralid/flumetsulam fb glufosinate in 38-cm row spacing.</p>","PeriodicalId":7567,"journal":{"name":"Agrosystems, Geosciences & Environment","volume":"8 1","pages":""},"PeriodicalIF":1.5000,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/agg2.70074","citationCount":"0","resultStr":"{\"title\":\"Integrated effect of row spacing and herbicide programs on photosynthetically active radiation, control, and seed production of multiple herbicide-resistant Palmer amaranth in corn\",\"authors\":\"Ramandeep Kaur, Nevin C. Lawrence, Yeyin Shi, Parminder S. Chahal, Stevan Z. Knezevic, Amit J. 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引用次数: 0
摘要
多重抗除草剂（MHR）苋菜被列为内布拉斯加州行作物田最成问题的杂草。窄行距与除草剂的结合可以增强对MHR苋菜的控制。本研究的目的是评价行距和除草剂方案对抗草甘膦/草铵膦玉米的MHR苋菜控制、密度、种子产量、玉米损伤、光合有效辐射（PAR）拦截和籽粒产量的综合影响。2020年和2021年，在东北部卡尔顿附近的一个种植田中进行了现场试验，该田中感染了乙酰乳酸合酶抑制剂/阿特拉津/草甘膦抗性帕尔默苋菜。除草剂行间距的相互作用对大多数变量都是显著的。氟氟乙酸/异草柳酮/硫脲甲酮-甲基，然后（fb）草甘膦，乙草胺/甲氧三酮，草甘膦，乙草胺/氯吡酯/氟甲磺胺，草甘膦/麦草畏/腾博酮，在苗期后期（DALPOST）除草剂施用后90天，控制帕尔默苋菜≥90%。草甘膦（麦草畏/替溴三酮）和乙草胺/甲氧三酮（草铵膦），行间距分别为38和76厘米，氟氟乙酸/异草氟唑酮/硫脲-甲基草铵膦，以及乙草胺/氯吡酯/氟甲磺胺（草铵膦），行间距为38厘米，未记录帕尔默苋菜30 DALPOST。行距较窄的除草剂方案比行距为76 cm的除草剂方案具有更高的PAR截留率，行距为30 d （DAEPOST）和15 d （DALPOST）。行间距为38厘米的乙草胺/氯吡唑啉/氟metsulam fb草铵膦可获得较高的玉米产量（13,222-13,596 kg ha - 1）。使用乙草胺/甲氨三酮/草铵膦和草铵膦/麦草畏/腾苯三酮的苋菜种子产量为零；氟氟乙酸/异氟氟唑/硫脲-甲基fb草铵膦，行距76 cm；行距38厘米的乙草胺/氯吡唑啉/氟美安定和草铵膦。
Integrated effect of row spacing and herbicide programs on photosynthetically active radiation, control, and seed production of multiple herbicide-resistant Palmer amaranth in corn
Multiple herbicide-resistant (MHR) Palmer amaranth has been ranked as the most problematic weed in row crop fields in Nebraska. Integration of narrow row spacing with herbicide might augment control of MHR Palmer amaranth. The objectives of this study were to evaluate an integrated effect of row spacing and herbicide programs for MHR Palmer amaranth control, density, seed production, corn injury, photosynthetically active radiation (PAR) interception, and grain yield in glyphosate/glufosinate-resistant corn. Field experiments were conducted in 2020 and 2021 in a grower's field infested with acetolactate synthase-inhibitor/atrazine/glyphosate-resistant Palmer amaranth near Carleton, NE. Herbicide-by-row spacing interactions were significant for most variables. Flufenacet/isoxaflutole/thiencarbazone-methyl followed by (fb) glufosinate, acetochlor/mesotrione applied pre-emergence (PRE) or fb glufosinate, acetochlor/clopyralid/flumetsulam fb glufosinate, and glufosinate fb dicamba/tembotrione controlled Palmer amaranth ≥90% at 90 days after late post-emergence (DALPOST) herbicide application. Glufosinate fb dicamba/tembotrione and acetochlor/mesotrione fb glufosinate with 38- and 76-cm row spacing, flufenacet/isoxaflutole/thiencarbazone-methyl fb glufosinate, and acetochlor/clopyralid/flumetsulam fb glufosinate with 38-cm row spacing recorded no Palmer amaranth 30 DALPOST. Herbicide programs with narrow row spacing had numerically higher PAR interception compared with 76-cm row spacing 30 days after early post-emergence (DAEPOST) and 15 DALPOST. Higher corn yield (13,222–13,596 kg ha−1) was obtained with acetochlor/clopyralid/flumetsulam fb glufosinate with 38-cm row spacing. Palmer amaranth seed production was zero with acetochlor/mesotrione fb glufosinate, and glufosinate fb dicamba/tembotrione; flufenacet/isoxaflutole/thiencarbazone-methyl fb glufosinate in 76-cm row spacing; and acetochlor/clopyralid/flumetsulam fb glufosinate in 38-cm row spacing.
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