Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean
Herbicides are widely used in soybean for weed control, and the selection pressure attributed to the repeated use of herbicides with similar modes of action on the same site has caused selection for resistant biotypes within and among previously susceptible species, such as Euphorbia heterophylla L....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Universidade de São Paulo
2005-10-01
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| Series: | Scientia Agricola |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500007&tlng=en |
| _version_ | 1798020416340492288 |
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| author | Gerson Augusto Gelmini Ricardo Victória Filho Maria do Carmo de Salvo Soares Novo Márcio Luiz Adoryan |
| author_facet | Gerson Augusto Gelmini Ricardo Victória Filho Maria do Carmo de Salvo Soares Novo Márcio Luiz Adoryan |
| author_sort | Gerson Augusto Gelmini |
| collection | DOAJ |
| description | Herbicides are widely used in soybean for weed control, and the selection pressure attributed to the repeated use of herbicides with similar modes of action on the same site has caused selection for resistant biotypes within and among previously susceptible species, such as Euphorbia heterophylla L., in relation to ALS enzyme inhibitors, in the states of Paraná, Rio Grande do Sul, and São Paulo, Brazil. Seeds of E. heterophylla were collected to examine possible new cases of resistant populations and to test alternative herbicide treatments to manage these populations, in the Caarapó region, State of Mato Grosso do Sul, Brazil, in areas where plants of this species have survived continuous herbicide applications. The experiment was carried out under greenhouse conditions, where biotypes with a history of suspected resistance were compared with a known susceptible biotype. Several post-emergence herbicides were sprayed at zero, one, two, four, and eight times the recommended field application rates. Twenty days after application, plants were harvested, and control percentage and fresh weight were determined to establish dose-response curves, in the aim to obtain the resistance factor using CD50 and RD50 data. The chlorimuron-ethyl resistance factor values for the control percentage and fresh weight parameters were higher than 16.5 and 16.9, respectively, while imazethapyr showed resistance factors higher than 25.0 and 23.5, respectively. The resistant biotype showed different resistance levels to chlorimuron-ethyl and imazethapyr, showing cross-resistance to the sulfonylurea and imidazolinone groups. Nevertheless, this biotype was effectively controlled by fomesafen (250 g ha-1), lactofen (120 g ha-1), flumiclorac-pentyl (40 g ha-1), glufosinate-ammonium (150 g ha-1), and glyphosate (360 g ha-1). |
| first_indexed | 2024-04-11T16:57:08Z |
| format | Article |
| id | doaj.art-d0b083e131a243d480261035f80b4119 |
| institution | Directory Open Access Journal |
| issn | 1678-992X |
| language | English |
| last_indexed | 2024-04-11T16:57:08Z |
| publishDate | 2005-10-01 |
| publisher | Universidade de São Paulo |
| record_format | Article |
| series | Scientia Agricola |
| spelling | doaj.art-d0b083e131a243d480261035f80b41192022-12-22T04:13:14ZengUniversidade de São PauloScientia Agricola1678-992X2005-10-01625452457Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybeanGerson Augusto GelminiRicardo Victória Filho0Maria do Carmo de Salvo Soares Novo1Márcio Luiz Adoryan2USPIACUSPHerbicides are widely used in soybean for weed control, and the selection pressure attributed to the repeated use of herbicides with similar modes of action on the same site has caused selection for resistant biotypes within and among previously susceptible species, such as Euphorbia heterophylla L., in relation to ALS enzyme inhibitors, in the states of Paraná, Rio Grande do Sul, and São Paulo, Brazil. Seeds of E. heterophylla were collected to examine possible new cases of resistant populations and to test alternative herbicide treatments to manage these populations, in the Caarapó region, State of Mato Grosso do Sul, Brazil, in areas where plants of this species have survived continuous herbicide applications. The experiment was carried out under greenhouse conditions, where biotypes with a history of suspected resistance were compared with a known susceptible biotype. Several post-emergence herbicides were sprayed at zero, one, two, four, and eight times the recommended field application rates. Twenty days after application, plants were harvested, and control percentage and fresh weight were determined to establish dose-response curves, in the aim to obtain the resistance factor using CD50 and RD50 data. The chlorimuron-ethyl resistance factor values for the control percentage and fresh weight parameters were higher than 16.5 and 16.9, respectively, while imazethapyr showed resistance factors higher than 25.0 and 23.5, respectively. The resistant biotype showed different resistance levels to chlorimuron-ethyl and imazethapyr, showing cross-resistance to the sulfonylurea and imidazolinone groups. Nevertheless, this biotype was effectively controlled by fomesafen (250 g ha-1), lactofen (120 g ha-1), flumiclorac-pentyl (40 g ha-1), glufosinate-ammonium (150 g ha-1), and glyphosate (360 g ha-1).http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500007&tlng=enmilkweedcross-resistanceimidazolinonesulfonylurea |
| spellingShingle | Gerson Augusto Gelmini Ricardo Victória Filho Maria do Carmo de Salvo Soares Novo Márcio Luiz Adoryan Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean Scientia Agricola milkweed cross-resistance imidazolinone sulfonylurea |
| title | Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean |
| title_full | Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean |
| title_fullStr | Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean |
| title_full_unstemmed | Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean |
| title_short | Resistence of Euphorbia Heterophylla L. to ALS-inhibiting herbicides in soybean |
| title_sort | resistence of euphorbia heterophylla l to als inhibiting herbicides in soybean |
| topic | milkweed cross-resistance imidazolinone sulfonylurea |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000500007&tlng=en |
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