<b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769
This study aimed to evaluate the fluctuation of S. frugiperda eggs and natural parasitism by Trichogramma and identify and quantify parasitoid species in maize fields in the state of Rio Grande do Sul, Brazil. Surveys were carried out in two growing seasons: in 2006/2007 we assessed one growing sea...
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| Format: | Article |
| Language: | English |
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Eduem (Editora da Universidade Estadual de Maringá)
2013-02-01
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| Series: | Acta Scientiarum: Agronomy |
| Subjects: | |
| Online Access: | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16769 |
| _version_ | 1818294330322845696 |
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| author | Sônia Thereza Bastos Dequech Cátia Camera Vinicius Soares Sturza Leandro do Prado Ribeiro Ranyse Barbosa Querino Sônia Poncio |
| author_facet | Sônia Thereza Bastos Dequech Cátia Camera Vinicius Soares Sturza Leandro do Prado Ribeiro Ranyse Barbosa Querino Sônia Poncio |
| author_sort | Sônia Thereza Bastos Dequech |
| collection | DOAJ |
| description | This study aimed to evaluate the fluctuation of S. frugiperda eggs and natural parasitism by Trichogramma and identify and quantify parasitoid species in maize fields in the state of Rio Grande do Sul, Brazil. Surveys were carried out in two growing seasons: in 2006/2007 we assessed one growing season (late sowing) in Santa Maria, and in 2007/2008 we assessed two growing seasons (early and late sowing) in Santa Bárbara do Sul. Daily air temperature and rainfall were recorded at both locations. In each evaluation, entire plants were examined for the presence or absence of S. frugiperda egg masses, which were analyzed for larvae hatching or parasitoid emergence. The number of S. frugiperda eggs is higher between 8 and 30 days after plant emergence, decreasing in the later stages of maize growth; the occurrence of parasitoids begins about two days after pest egg occurrence; S. frugiperda egg parasitism is low; and eggs are parasitized by Trichogramma pretiosum and Trichogramma atopovirilia, with marked predominance of the first and possible occurrence of both parasitoid species in the same egg mass.
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| first_indexed | 2024-12-13T03:30:02Z |
| format | Article |
| id | doaj.art-962d88a3d2dd4efdaa253093b5cb919a |
| institution | Directory Open Access Journal |
| issn | 1679-9275 1807-8621 |
| language | English |
| last_indexed | 2024-12-13T03:30:02Z |
| publishDate | 2013-02-01 |
| publisher | Eduem (Editora da Universidade Estadual de Maringá) |
| record_format | Article |
| series | Acta Scientiarum: Agronomy |
| spelling | doaj.art-962d88a3d2dd4efdaa253093b5cb919a2022-12-22T00:01:11ZengEduem (Editora da Universidade Estadual de Maringá)Acta Scientiarum: Agronomy1679-92751807-86212013-02-0135310.4025/actasciagron.v35i3.16769<b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769Sônia Thereza Bastos Dequech0Cátia Camera1Vinicius Soares Sturza2Leandro do Prado Ribeiro3Ranyse Barbosa Querino4Sônia Poncio5Universidade Federal de Santa MariaUniversidade Federal de Santa MariaUniversidade Federal de Santa MariaUniversidade de São PauloEmpresa Brasileira de Pesquisa AgropecuáriaUniversidade Federal de Santa Maria This study aimed to evaluate the fluctuation of S. frugiperda eggs and natural parasitism by Trichogramma and identify and quantify parasitoid species in maize fields in the state of Rio Grande do Sul, Brazil. Surveys were carried out in two growing seasons: in 2006/2007 we assessed one growing season (late sowing) in Santa Maria, and in 2007/2008 we assessed two growing seasons (early and late sowing) in Santa Bárbara do Sul. Daily air temperature and rainfall were recorded at both locations. In each evaluation, entire plants were examined for the presence or absence of S. frugiperda egg masses, which were analyzed for larvae hatching or parasitoid emergence. The number of S. frugiperda eggs is higher between 8 and 30 days after plant emergence, decreasing in the later stages of maize growth; the occurrence of parasitoids begins about two days after pest egg occurrence; S. frugiperda egg parasitism is low; and eggs are parasitized by Trichogramma pretiosum and Trichogramma atopovirilia, with marked predominance of the first and possible occurrence of both parasitoid species in the same egg mass. https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16769biological controlfall armywormNoctuidaeTrichogrammatidaeZea mays L. |
| spellingShingle | Sônia Thereza Bastos Dequech Cátia Camera Vinicius Soares Sturza Leandro do Prado Ribeiro Ranyse Barbosa Querino Sônia Poncio <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 Acta Scientiarum: Agronomy biological control fall armyworm Noctuidae Trichogrammatidae Zea mays L. |
| title | <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 |
| title_full | <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 |
| title_fullStr | <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 |
| title_full_unstemmed | <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 |
| title_short | <b>Population fluctuation of <i>Spodoptera frugiperda</i> eggs and natural parasitism by <i>Trichogramma</i> in maize</b> - doi: 10.4025/actasciagron.v35i3.16769 |
| title_sort | b population fluctuation of i spodoptera frugiperda i eggs and natural parasitism by i trichogramma i in maize b doi 10 4025 actasciagron v35i3 16769 |
| topic | biological control fall armyworm Noctuidae Trichogrammatidae Zea mays L. |
| url | https://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/16769 |
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