An assessment of resistance of two plantain ( Plantago lanceolata ) cultivars to phenoxy herbicides

IF 1.5 3区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
Nidhi Shrivastav, Kerry C. Harrington, Peter D. Kemp, Hossein Ghanizadeh
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Abstract

Plantain (Plantago lanceolata L.) is becoming widely adopted in New Zealand livestock systems due to its productivity, nutritional values and its role in reducing nitrate leaching from grazed pastures. Although sometimes grown alone, plantain is generally used in mixtures with grass and clover species; however, this makes it more difficult to selectively control weeds within these swards using herbicides. There has been some selection for phenoxy herbicide resistance in a cultivar of plantain, Agritonic, in New Zealand. Its level of resistance to MCPB, MCPA, an MCPB/MCPA mix, 2,4-D and 2,4-DB was compared to that of a more susceptible cultivar, Tonic, in dose-response experiments. The results showed that the resistance ranged between 1.3 and 3.5-fold compared to Tonic, and it was only significant for 2,4-D and MCPB/MCPA mix in the first and second experiments, respectively. Among all the tested herbicides, rates of MCPB and the MCPB/MCPA mix that are currently used in clover-based pastures were less damaging to Agritonic plants than the other herbicides tested. However, variability in resistance of the Agritonic plants resulted in some surviving the recommended rates of MCPA, 2,4-DB and 2,4-D, suggesting there is potential to select for higher levels of resistance to phenoxy herbicides.
两种车前草(Plantago lanceolata)品种对苯氧类除草剂抗性评价
车前草(Plantago lanceolata L.)由于其生产力、营养价值和减少放牧牧场硝酸盐淋失的作用,在新西兰畜牧业系统中被广泛采用。虽然有时单独生长,车前草通常与草和三叶草混合使用;然而,这使得使用除草剂有选择地控制这些草地上的杂草变得更加困难。在新西兰的一个大蕉品种Agritonic中有一些抗苯氧基除草剂的选择。在剂量效应试验中,将其对MCPB、MCPA、MCPB/MCPA混合、2,4- d和2,4- db的抗性水平与更敏感的品种Tonic进行了比较。结果表明,与补益相比,其抗性范围在1.3 ~ 3.5倍之间,仅在第一次和第二次实验中对2,4- d和MCPB/MCPA混合物具有显著性。在所有被试除草剂中,目前在三叶草牧场使用的MCPB和MCPB/MCPA混合除草剂对农业植物的危害比其他被试除草剂要小。然而,Agritonic植物的抗性变异导致一些植物在MCPA, 2,4- db和2,4- d的推荐剂量下存活,这表明有可能选择更高水平的苯氧类除草剂抗性。
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来源期刊
CiteScore
4.90
自引率
16.70%
发文量
31
审稿时长
3 months
期刊介绍: The New Zealand Journal of Agricultural Research publishes original research papers, review papers, short communications, book reviews, letters, and forum articles. We welcome submissions on all aspects of animal and pastoral science relevant to temperate and subtropical regions. The journal''s subject matter includes soil science, fertilisers, insect pests, plant pathology, weeds, forage crops, management systems, agricultural economics, agronomy, and animal science. The journal also accepts crossover papers on subjects such as land –water interactions.
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