Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone
We evaluated the combined effects of diclofop-methyl herbicide application and the air pollutant ozone (O3) on diclofop-methyl-resistant and -susceptible biotypes of Italian ryegrass (Lolium multiflorum). We conducted two experiments, one with a long vegetative growth period and the other with a sho...
Guardado en:
| Publicado: |
2008
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00431737_v48_n1_p68_MartinezGhersa http://hdl.handle.net/20.500.12110/paper_00431737_v48_n1_p68_MartinezGhersa |
| Aporte de: |
| id |
paper:paper_00431737_v48_n1_p68_MartinezGhersa |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_00431737_v48_n1_p68_MartinezGhersa2023-06-08T15:04:56Z Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone Fitness Herbicide Ozone Resistance Stress anthropogenic effect environmental stress grass growth response herbicide ozone pesticide application pesticide resistance phytomass phytotoxicity seed production weed control yield response Lolium Lolium multiflorum We evaluated the combined effects of diclofop-methyl herbicide application and the air pollutant ozone (O3) on diclofop-methyl-resistant and -susceptible biotypes of Italian ryegrass (Lolium multiflorum). We conducted two experiments, one with a long vegetative growth period and the other with a short vegetative growth in late spring with seed production in summer. As expected, because of its phytotoxicity, the herbicide alone reduced total vegetative biomass, leaf area, tiller number and seed production at most sampling periods in susceptible plants for both experiments. However, it had variable effects on resistant plants, including a positive effect on seed production. Ozone alone delayed vegetative biomass accumulation and reduced leaf area and seed biomass in both experiments. However, the effects of O 3 on some parameters were altered by herbicide rate and/or biotype. Especially notable was a greater reduction in seed biomass because of O 3 in resistant than in susceptible plants with no herbicide. If these apparent differential responses to herbicide and O3 stress of susceptible and resistant plants are confirmed and persist over time, evolutionary tradeoffs may occur. For example, the frequency of resistant plants in a population may be altered in response to interactions between herbicides and other anthropogenic stresses. © 2008 The Authors. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00431737_v48_n1_p68_MartinezGhersa http://hdl.handle.net/20.500.12110/paper_00431737_v48_n1_p68_MartinezGhersa |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Fitness Herbicide Ozone Resistance Stress anthropogenic effect environmental stress grass growth response herbicide ozone pesticide application pesticide resistance phytomass phytotoxicity seed production weed control yield response Lolium Lolium multiflorum |
| spellingShingle |
Fitness Herbicide Ozone Resistance Stress anthropogenic effect environmental stress grass growth response herbicide ozone pesticide application pesticide resistance phytomass phytotoxicity seed production weed control yield response Lolium Lolium multiflorum Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| topic_facet |
Fitness Herbicide Ozone Resistance Stress anthropogenic effect environmental stress grass growth response herbicide ozone pesticide application pesticide resistance phytomass phytotoxicity seed production weed control yield response Lolium Lolium multiflorum |
| description |
We evaluated the combined effects of diclofop-methyl herbicide application and the air pollutant ozone (O3) on diclofop-methyl-resistant and -susceptible biotypes of Italian ryegrass (Lolium multiflorum). We conducted two experiments, one with a long vegetative growth period and the other with a short vegetative growth in late spring with seed production in summer. As expected, because of its phytotoxicity, the herbicide alone reduced total vegetative biomass, leaf area, tiller number and seed production at most sampling periods in susceptible plants for both experiments. However, it had variable effects on resistant plants, including a positive effect on seed production. Ozone alone delayed vegetative biomass accumulation and reduced leaf area and seed biomass in both experiments. However, the effects of O 3 on some parameters were altered by herbicide rate and/or biotype. Especially notable was a greater reduction in seed biomass because of O 3 in resistant than in susceptible plants with no herbicide. If these apparent differential responses to herbicide and O3 stress of susceptible and resistant plants are confirmed and persist over time, evolutionary tradeoffs may occur. For example, the frequency of resistant plants in a population may be altered in response to interactions between herbicides and other anthropogenic stresses. © 2008 The Authors. |
| title |
Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| title_short |
Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| title_full |
Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| title_fullStr |
Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| title_full_unstemmed |
Growth and yield responses of Italian ryegrass (Lolium multiflorum) to diclofop-methyl and ozone |
| title_sort |
growth and yield responses of italian ryegrass (lolium multiflorum) to diclofop-methyl and ozone |
| publishDate |
2008 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00431737_v48_n1_p68_MartinezGhersa http://hdl.handle.net/20.500.12110/paper_00431737_v48_n1_p68_MartinezGhersa |
| _version_ |
1768545275582873600 |