Novel use pattern of pendimethalin for annual ryegrass (Lolium rigidum Gaudin) control in wheat and barley

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-01-11 DOI:10.3389/fagro.2023.1341880

G. Mahajan, B. S. Chauhan

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引用次数: 0

Abstract

Annual ryegrass (Lolium rigidum Gaudin) is a problematic weed in most of the cropping regions in Australia. Evolved herbicide resistance to multiple modes of action groups, the lack of new herbicidal molecules, and the emergence of late cohorts in winter season crops necessitate the use of existing herbicides in an innovative way to control L. rigidum. Pendimethalin as pre-emergence (PRE) is used for L. rigidum control; however, it is unable to control late cohorts of L. rigidum in winter season crops. Pot studies were conducted from 2019 to 2021 to evaluate the effect of a post-emergence (POST) application of pendimethalin with six doses (0, 220, 440, 880, 1,760, and 3,520 g a.i. ha-1) on L. rigidum control in addition to crop safety in wheat, barley, and sorghum. POST application of pendimethalin was found to be safe for wheat and barley, and the biomass reduction in both crops at varied rates (220 to 3,520 g ha−1) of pendimethalin ranged from 10% to 20%. A dose–response study revealed that the pendimethalin dose required for 50% mortality and growth reduction of L. rigidum was 179 and 144 g ai ha−1, respectively. Pendimethalin at 880 g ai ha−1 completely killed late cohorts of L. rigidum. These results suggest that the POST application of pendimethalin can be used for the effective control of late cohorts of L. rigidum in wheat and barley crops. POST application of pendimethalin suppressed the biomass of sorghum plants compared with the non-treated control treatment, and biomass reduction in sorghum at different pendimethalin doses ranged from 32% to 40%. Results implied that POST applications of pendimethalin in wheat and barley can diversify herbicide programs in managing L. rigidum and may help in delaying the evolution of resistance in this weed.

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在小麦和大麦中防治一年生黑麦草（Lolium rigidum Gaudin）时使用戊唑醇的新模式

一年生黑麦草（Lolium rigidum Gaudin）是澳大利亚大部分种植区的问题杂草。由于对多种作用方式的除草剂产生了抗药性，缺乏新的除草剂分子，以及冬季作物出现晚熟品种，因此必须以创新的方式使用现有的除草剂来控制硬叶黑麦草。苄嘧磺隆（Pendimethalin）作为萌芽前除草剂（PRE）可用于控制硬叶鳞茎，但无法控制冬季作物中硬叶鳞茎的后期群落。在2019年至2021年期间进行了盆栽研究，以评估六种剂量（0、220、440、880、1,760和3,520 g a.i. ha-1）的萌芽后（POST）施用戊唑醇对小麦、大麦和高粱中僵菌的控制效果以及作物安全性。研究发现，小麦和大麦在施药后施用戊唑醇是安全的，在施用不同剂量（220 至 3,520 克/公顷-1）的戊唑醇后，两种作物的生物量减少了 10% 至 20%。剂量-反应研究表明，使僵叶蓟马死亡和生长减少 50%所需的戊唑醇剂量分别为 179 和 144 g ai ha-1。880 g ai ha-1 的苯醚甲环唑可完全杀死晚期的僵尾金龟子。这些结果表明，在小麦和大麦作物的后期施用戊唑醇可有效控制僵菌后期群落。与未施药的对照处理相比，施药后施用戊唑醇抑制了高粱植株的生物量，不同剂量的戊唑醇对高粱生物量的抑制率为 32% 至 40%。研究结果表明，在小麦和大麦中施用噻草酮后，可以使除草剂方案多样化，从而管理硬粒禾本科杂草，并有助于延缓该杂草抗药性的演变。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico