First report of glyphosate and paraquat resistance in two Plantago biotypes

IF 1.1 Q3 AGRONOMY

South African Journal of Plant and Soil Pub Date : 2021-03-15 DOI:10.1080/02571862.2021.1879287

Vhuthu Ndou, Frederick Eksteen, E. Phiri, P. Pieterse

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引用次数: 3

Abstract

Resistance to glyphosate in plantago (Plantago lanceolata L.), a serious weed in South Africa, was confirmed in 2003. More recently, a plantago biotype that is putatively resistant to both glyphosate and paraquat was reported. Seeds from a putatively susceptible (S) plantago population and from two putatively resistant populations (R1 and R2) were subjected to glyphosate and paraquat. To investigate possible multiple resistance, sequential application of glyphosate and paraquat was explored. The results showed an LD50 of 891.89 g a.e. ha−1 and 387.75 g a.i. ha−1 for glyphosate and paraquat respectively for the S biotype. For glyphosate, the LD50 value for R1 was 3842.61 g a.e. ha−1. The LD50 for the R2 biotype to glyphosate was 2020.39 g a.e. ha−1. The paraquat LD50 values for the R1 and R2 biotypes were 785.14 and 1246.43 g a.i. ha−1 respectively, resulting in resistance indices of 2 and 3 respectively. Sequential application of glyphosate and paraquat was not effective in plantago management. The R biotypes showed resistance to both glyphosate and paraquat indicating possible multiple resistance.

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两种车前草生物型对草甘膦和百草枯抗性的首次报道

车前草(plantago lanceolata L.)是南非的一种严重杂草，2003年证实其对草甘膦具有抗性。最近，一种车前草生物型被认为对草甘膦和百草枯都具有抗性。对一个推定易感的车前草种群和两个推定抗性的车前草种群(R1和R2)的种子施用草甘膦和百草枯。为了调查可能的多重抗性，对草甘膦和百草枯的顺序施用进行了探索。结果表明，S型草甘膦和百草枯的LD50分别为891.89 g a.e. ha−1和387.75 g a.i. ha−1。对于草甘膦，R1的LD50值为3842.61 g a.e. ha−1。R2型对草甘膦的LD50为2020.39 g a.e. ha−1。R1和R2生物型的百草枯LD50分别为785.14和1246.43 g a.i. ha−1，抗性指数分别为2和3。连续施用草甘膦和百草枯对车前草的治理效果不明显。R型对草甘膦和百草枯均有抗性，表明可能存在多重抗性。

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来源期刊

South African Journal of Plant and Soil Agricultural and Biological Sciences-Plant Science

CiteScore

1.90

自引率

11.10%

发文量

期刊介绍： The Journal has a proud history of publishing quality papers in the fields of applied plant and soil sciences and has, since its inception, recorded a vast body of scientific information with particular reference to South Africa.