Population dynamic of the predator Doru luteipes Scudder on maize plants
Autor(a) principal: | |
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Data de Publicação: | 1997 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Pesquisa Agropecuária Brasileira (Online) |
Texto Completo: | https://seer.sct.embrapa.br/index.php/pab/article/view/4655 |
Resumo: | The predator Doru luteipes (Scudder) (Dermaptera: Forficulidae) has shown a great potential as a biological control agent against two key pests of maize, the fall armyworm Spodoptera frugiperda (Smith) and the corn earworm Helicoverpa zea (Boddie). This work was conducted with the objective of verifying the presence of the predator on maize field crop, during six years, with monthly planting time, in Sete Lagoas, MG, Brazil, at Embrapa-CNPMS. Weekly, 100 whorls of maize plants were shown, and the number of ovipositions nymphs and adults of the predator was recorded. The percentage of plants with at least one individual (nymph or adult) was also computed. The presence of the predator was generalized. The greatest occurrence was observed during the summer time, which is the best period for maize growth in the region. An average of 4.11 egg masses, 10.65 nymphs and 84.19 adults was observed for each 100 sampled plants. Plants with the insect were 42.8% on average, reaching in some planting dates the level of 95%. Along the year, a quadratic response between planting dates and the insect life stages was observed. However, when splitting the planting dates in two periods before and after the minimum point of adjusted curve, the relationship was linear for all stages. |
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Population dynamic of the predator Doru luteipes Scudder on maize plantsFlutuação populacional do predador Doru luteipes Scudder em plantas de milhobiological control; maize pests; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; natural enemy; ecologycontrole biológico; pragas de milho; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; dinâmica populacionalThe predator Doru luteipes (Scudder) (Dermaptera: Forficulidae) has shown a great potential as a biological control agent against two key pests of maize, the fall armyworm Spodoptera frugiperda (Smith) and the corn earworm Helicoverpa zea (Boddie). This work was conducted with the objective of verifying the presence of the predator on maize field crop, during six years, with monthly planting time, in Sete Lagoas, MG, Brazil, at Embrapa-CNPMS. Weekly, 100 whorls of maize plants were shown, and the number of ovipositions nymphs and adults of the predator was recorded. The percentage of plants with at least one individual (nymph or adult) was also computed. The presence of the predator was generalized. The greatest occurrence was observed during the summer time, which is the best period for maize growth in the region. An average of 4.11 egg masses, 10.65 nymphs and 84.19 adults was observed for each 100 sampled plants. Plants with the insect were 42.8% on average, reaching in some planting dates the level of 95%. Along the year, a quadratic response between planting dates and the insect life stages was observed. However, when splitting the planting dates in two periods before and after the minimum point of adjusted curve, the relationship was linear for all stages.O predador Doru luteipes Scudder (Dermaptera: Forficulidae) tem-se mostrado um inseto com grande potencial no controle biológico de duas das principais pragas do milho, Spodoptera frugiperda (Smith) e Helicoverpa zea (Boddie). Este trabalho teve como objetivo estudar a flutuação do predador em milho, durante seis anos, em plantios mensais, em Sete Lagoas, MG, Brasil, na Embrapa-CNPMS. Foram amostrados semanalmente 100 cartuchos de milho, anotando-se o número de posturas, ninfas e adultos do predador. Computou-se também a porcentagem de plantas contendo pelo menos um indivíduo (ninfa ou adulto). A presença do predador foi generalizada, com tendência às maiores ocorrências nos plantios efetuados nos meses mais quentes do ano, que representam as épocas de plantios mais recomendadas para a região. Observou-se, em cada 100 plantas amostradas, uma média de 4,11 posturas, 10,65 ninfas e 84,19 adultos. A ocorrência de plantas com pelo menos uma ninfa ou um adulto do predador foi, em média, de 42,8%, chegando, em algumas épocas de plantio, a 95%. Ao longo do ano, foi observada uma resposta quadrática entre época de plantio e a ocorrência de todas as fases do predador. Entretanto, considerando duas fases distintas da curva ajustada, antes e depois do ponto de mínimo, a relação entre a presença do predador e os meses de plantio correspondentes foi linear.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCruz, IvanC. Oliveira, Antônio1997-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/4655Pesquisa Agropecuaria Brasileira; v.32, n.4, abr. 1997; 363-368Pesquisa Agropecuária Brasileira; v.32, n.4, abr. 1997; 363-3681678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/4655/7235info:eu-repo/semantics/openAccess2015-03-10T19:05:14Zoai:ojs.seer.sct.embrapa.br:article/4655Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2015-03-10T19:05:14Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Population dynamic of the predator Doru luteipes Scudder on maize plants Flutuação populacional do predador Doru luteipes Scudder em plantas de milho |
title |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
spellingShingle |
Population dynamic of the predator Doru luteipes Scudder on maize plants Cruz, Ivan biological control; maize pests; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; natural enemy; ecology controle biológico; pragas de milho; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; dinâmica populacional |
title_short |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
title_full |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
title_fullStr |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
title_full_unstemmed |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
title_sort |
Population dynamic of the predator Doru luteipes Scudder on maize plants |
author |
Cruz, Ivan |
author_facet |
Cruz, Ivan C. Oliveira, Antônio |
author_role |
author |
author2 |
C. Oliveira, Antônio |
author2_role |
author |
dc.contributor.none.fl_str_mv |
|
dc.contributor.author.fl_str_mv |
Cruz, Ivan C. Oliveira, Antônio |
dc.subject.por.fl_str_mv |
biological control; maize pests; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; natural enemy; ecology controle biológico; pragas de milho; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; dinâmica populacional |
topic |
biological control; maize pests; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; natural enemy; ecology controle biológico; pragas de milho; Dermaptera; Spodoptera frugiperda; Helicoverpa zea; dinâmica populacional |
description |
The predator Doru luteipes (Scudder) (Dermaptera: Forficulidae) has shown a great potential as a biological control agent against two key pests of maize, the fall armyworm Spodoptera frugiperda (Smith) and the corn earworm Helicoverpa zea (Boddie). This work was conducted with the objective of verifying the presence of the predator on maize field crop, during six years, with monthly planting time, in Sete Lagoas, MG, Brazil, at Embrapa-CNPMS. Weekly, 100 whorls of maize plants were shown, and the number of ovipositions nymphs and adults of the predator was recorded. The percentage of plants with at least one individual (nymph or adult) was also computed. The presence of the predator was generalized. The greatest occurrence was observed during the summer time, which is the best period for maize growth in the region. An average of 4.11 egg masses, 10.65 nymphs and 84.19 adults was observed for each 100 sampled plants. Plants with the insect were 42.8% on average, reaching in some planting dates the level of 95%. Along the year, a quadratic response between planting dates and the insect life stages was observed. However, when splitting the planting dates in two periods before and after the minimum point of adjusted curve, the relationship was linear for all stages. |
publishDate |
1997 |
dc.date.none.fl_str_mv |
1997-04-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/4655 |
url |
https://seer.sct.embrapa.br/index.php/pab/article/view/4655 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://seer.sct.embrapa.br/index.php/pab/article/view/4655/7235 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
publisher.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira |
dc.source.none.fl_str_mv |
Pesquisa Agropecuaria Brasileira; v.32, n.4, abr. 1997; 363-368 Pesquisa Agropecuária Brasileira; v.32, n.4, abr. 1997; 363-368 1678-3921 0100-104x reponame:Pesquisa Agropecuária Brasileira (Online) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Pesquisa Agropecuária Brasileira (Online) |
collection |
Pesquisa Agropecuária Brasileira (Online) |
repository.name.fl_str_mv |
Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
pab@sct.embrapa.br || sct.pab@embrapa.br |
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1793416653619331072 |