Recurrent Selection with Low Herbicide Rates and Salt Stress Decrease Sensitivity of Echinochloa colona to Imidazolinone
| Autor: | Vívian Ebeling Viana, Edinalvo Rabaioli Camargo, Lariza Benedetti, Nilda Roma-Burgos, Gustavo Maia Souza, Luis Antonio de Avila, Vinicios Rafael Gehrke, Pâmela Carvalho-Moore |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Irrigation junglerice Population reduced susceptibility Plant Science adaptation Echinochloa 01 natural sciences salinity chemistry.chemical_compound lcsh:Agriculture (General) education education.field_of_study biology fungi food and beverages 04 agricultural and veterinary sciences Imazapyr low herbicide dose selection Imazapic biology.organism_classification Effective dose (pharmacology) lcsh:S1-972 Salinity chemistry Agronomy 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Weed Agronomy and Crop Science 010606 plant biology & botany Food Science |
| Zdroj: | Agriculture Volume 11 Issue 3 Agriculture, Vol 11, Iss 187, p 187 (2021) |
| ISSN: | 2077-0472 |
| DOI: | 10.3390/agriculture11030187 |
| Popis: | Weeds represent an increasing challenge for crop systems since they have evolved adaptability to adverse environmental conditions, such as salinity stress. Herbicide effectiveness can be altered by the quality of water in which the weed is growing. This research aimed to study the combined effect of salt stress and recurrent selection with a sublethal dose of imidazolinone herbicides in the shifting of the sensitivity of Echinochloa colona (L.) Link (junglerice) to imidazolinone herbicides. This study was divided into two experiments in experiment I, three recurrent selection cycles were conducted in Pelotas/RS/Brazil with imazapic + imazapyr at 0.125× the field rate and in experiment II, three recurrent selection cycles were conducted in Fayetteville/AR/USA with imazethapyr, at 0.125× the recommended dose. Salt stress was implemented by irrigation with 120 mM sodium chloride (NaCl) solution. The effective dose for 50% control of the population (ED50) values increased from the field population to the second generation (G2) after recurrent selection with a sublethal dose of imidazolinone combined with salt stress, supporting the hypothesis of reduced susceptibility by the combination of these abiotic factors. Recurrent exposure to a sublethal dose of imazapic + imazapyr or imazethapyr, combined with salt stress, reduced susceptibility of Echinochloa colona (L.) plants to imidazolinone herbicides. |
| Databáze: | OpenAIRE |
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