Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Revista brasileira de entomologia (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300015 |
Resumo: | Some species of aphids are major pests on cereal crops and grass pastures. Usually these pests are not adequately controlled in pasture lands that become sources of aphid infestations to cereal crops. The dynamics of aphids and the incidence of natural enemies are less known in pasture systems than in cereal fields. The objective of this work was to assess the aphid infestation and natural aphid parasitism in different pasture composition. Three hypotheses were tested: 1- the aphid species composition in pastures may vary according to the cereal species in the field; 2- the mixture of two plant species can modify the amount and diversity of aphids; 3- the plant species composition of pasture fields influences the parasitism of aphids. Empirical data were obtained from three Poaceae fields: black oats (Avena strigosa L.), ryegrass (Lolium multiflorum L.), and a mixed field of black oats and ryegrass. The most abundant aphid species was Rhopalosiphum padi followed by Sitobion avenae. Plant species composition increases the amount and the parasitism rates of aphids. The mixture of heavily infested black oats with a poorly infested ryegrass resulted in reduction of aphid infestation in comparison with heavily-infested single plant species field. This is possible because the conditions are favorable for the development of parasitoid populations. Aphidius colemani was the main parasitoid found in these areas. |
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Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrassAphididaeAvena strigosa L.cereal cropsLolium multiflorum Lnatural parasitismSome species of aphids are major pests on cereal crops and grass pastures. Usually these pests are not adequately controlled in pasture lands that become sources of aphid infestations to cereal crops. The dynamics of aphids and the incidence of natural enemies are less known in pasture systems than in cereal fields. The objective of this work was to assess the aphid infestation and natural aphid parasitism in different pasture composition. Three hypotheses were tested: 1- the aphid species composition in pastures may vary according to the cereal species in the field; 2- the mixture of two plant species can modify the amount and diversity of aphids; 3- the plant species composition of pasture fields influences the parasitism of aphids. Empirical data were obtained from three Poaceae fields: black oats (Avena strigosa L.), ryegrass (Lolium multiflorum L.), and a mixed field of black oats and ryegrass. The most abundant aphid species was Rhopalosiphum padi followed by Sitobion avenae. Plant species composition increases the amount and the parasitism rates of aphids. The mixture of heavily infested black oats with a poorly infested ryegrass resulted in reduction of aphid infestation in comparison with heavily-infested single plant species field. This is possible because the conditions are favorable for the development of parasitoid populations. Aphidius colemani was the main parasitoid found in these areas.Sociedade Brasileira De Entomologia2012-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300015Revista Brasileira de Entomologia v.56 n.3 2012reponame:Revista brasileira de entomologia (Online)instname:Sociedade Brasileira De Entomologia (SBE)instacron:SBE10.1590/S0085-56262012005000052info:eu-repo/semantics/openAccessSturza,Vinícius SoaresPoncio,SôniaSantos,Aline Bosak dosLopes-da-Silva,Marceloeng2012-10-08T00:00:00Zoai:scielo:S0085-56262012000300015Revistahttp://www.rbentomologia.com/https://old.scielo.br/oai/scielo-oai.php||sbe@ufpr.br1806-96650085-5626opendoar:2012-10-08T00:00Revista brasileira de entomologia (Online) - Sociedade Brasileira De Entomologia (SBE)false |
dc.title.none.fl_str_mv |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
title |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
spellingShingle |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass Sturza,Vinícius Soares Aphididae Avena strigosa L. cereal crops Lolium multiflorum L natural parasitism |
title_short |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
title_full |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
title_fullStr |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
title_full_unstemmed |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
title_sort |
Infestation and natural parasitism of aphids in single and mixed pastures of black oats and ryegrass |
author |
Sturza,Vinícius Soares |
author_facet |
Sturza,Vinícius Soares Poncio,Sônia Santos,Aline Bosak dos Lopes-da-Silva,Marcelo |
author_role |
author |
author2 |
Poncio,Sônia Santos,Aline Bosak dos Lopes-da-Silva,Marcelo |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Sturza,Vinícius Soares Poncio,Sônia Santos,Aline Bosak dos Lopes-da-Silva,Marcelo |
dc.subject.por.fl_str_mv |
Aphididae Avena strigosa L. cereal crops Lolium multiflorum L natural parasitism |
topic |
Aphididae Avena strigosa L. cereal crops Lolium multiflorum L natural parasitism |
description |
Some species of aphids are major pests on cereal crops and grass pastures. Usually these pests are not adequately controlled in pasture lands that become sources of aphid infestations to cereal crops. The dynamics of aphids and the incidence of natural enemies are less known in pasture systems than in cereal fields. The objective of this work was to assess the aphid infestation and natural aphid parasitism in different pasture composition. Three hypotheses were tested: 1- the aphid species composition in pastures may vary according to the cereal species in the field; 2- the mixture of two plant species can modify the amount and diversity of aphids; 3- the plant species composition of pasture fields influences the parasitism of aphids. Empirical data were obtained from three Poaceae fields: black oats (Avena strigosa L.), ryegrass (Lolium multiflorum L.), and a mixed field of black oats and ryegrass. The most abundant aphid species was Rhopalosiphum padi followed by Sitobion avenae. Plant species composition increases the amount and the parasitism rates of aphids. The mixture of heavily infested black oats with a poorly infested ryegrass resulted in reduction of aphid infestation in comparison with heavily-infested single plant species field. This is possible because the conditions are favorable for the development of parasitoid populations. Aphidius colemani was the main parasitoid found in these areas. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000300015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0085-56262012005000052 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira De Entomologia |
publisher.none.fl_str_mv |
Sociedade Brasileira De Entomologia |
dc.source.none.fl_str_mv |
Revista Brasileira de Entomologia v.56 n.3 2012 reponame:Revista brasileira de entomologia (Online) instname:Sociedade Brasileira De Entomologia (SBE) instacron:SBE |
instname_str |
Sociedade Brasileira De Entomologia (SBE) |
instacron_str |
SBE |
institution |
SBE |
reponame_str |
Revista brasileira de entomologia (Online) |
collection |
Revista brasileira de entomologia (Online) |
repository.name.fl_str_mv |
Revista brasileira de entomologia (Online) - Sociedade Brasileira De Entomologia (SBE) |
repository.mail.fl_str_mv |
||sbe@ufpr.br |
_version_ |
1752126459541979136 |