Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production

Detalhes bibliográficos
Autor(a) principal: Krinski, Diones
Data de Publicação: 2017
Outros Autores: Foerster, Luís Amilton
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Bioscience journal (Online)
DOI: 10.14393/BJ-v33n1a2017-32743
Texto Completo: https://seer.ufu.br/index.php/biosciencejournal/article/view/32743
Resumo: Simulation of the attack of defoliating insects provides a measurement of the level of damage that the crop can support at a given developmental stage and also allows to quantify the loss of productivity. This study evaluated the effects of increasing levels of artificial defoliation in upland rice plants under field conditions, on grain production at three phenological stages, vegetative stage V8 (collar formation in the 8th leaf of the main stem), vegetative stage V12 (formation of the flag leaf) and reproductive stage R3/R4 (liberation of the panicle or anthesis). The percentage of damage at all stages increased significantly from 25% defoliation, and was higher when defoliation occurred in V8 and V12. Defoliation levels up to 50% in the reproductive stage did not influence the quantity of filled grains, total spikelets per panicle and weight of filled grains per panicle, and thus the pest control is not required. The data show that the control of leaf-chewing insects in upland rice should be restricted to the vegetative stage.
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spelling Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production Ataque simulado de insetos desfolhadores em arroz de terras altas cutivado na nova fronteira agrícola da floresta Amazônica (Brasil) e seu efeito sobre a produção de grãosIntegrated pest managementEconomic damage levelLeaf area reductionRice cropAgricultural SciencesSimulation of the attack of defoliating insects provides a measurement of the level of damage that the crop can support at a given developmental stage and also allows to quantify the loss of productivity. This study evaluated the effects of increasing levels of artificial defoliation in upland rice plants under field conditions, on grain production at three phenological stages, vegetative stage V8 (collar formation in the 8th leaf of the main stem), vegetative stage V12 (formation of the flag leaf) and reproductive stage R3/R4 (liberation of the panicle or anthesis). The percentage of damage at all stages increased significantly from 25% defoliation, and was higher when defoliation occurred in V8 and V12. Defoliation levels up to 50% in the reproductive stage did not influence the quantity of filled grains, total spikelets per panicle and weight of filled grains per panicle, and thus the pest control is not required. The data show that the control of leaf-chewing insects in upland rice should be restricted to the vegetative stage.A simulação do ataque de insetos desfolhadores fornece uma medida do nível de dano que uma cultura pode suportar em um determinado estágio de desenvolvimento e também permite quantificar a perda de produtividade. Assim, este estudo avaliou os efeitos de níveis crescentes de desfolha artificial em plantas de arroz de terras altas em condições de campo, na produção de grãos em três estádios fenológicos: na fase vegetativa V8 (formação do colar na 8ª folha da haste principal), estágio vegetativo V12 (formação da folha bandeira) e fase reprodutiva R3/R4 (liberação da panícula ou antese). A porcentagem de dano em todos os estágios aumentou significativamente a partir de 25% de desfolha, e foi maior quando ocorreu nos estágios V8 e V12. Níveis de desfolhas de até 50% no estádio reprodutivo não influenciaram a quantidade de grãos cheios, número total de espiguetas por panícula e peso de grãos cheios por panícula, e portanto, o controle de pragas desfolhadoras não é necessário nesta fase. Os dados mostram que o controle de insetos mastigadores de folhas no arroz de terras altas deve ser restrito à fase vegetativa.EDUFU2017-02-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.ufu.br/index.php/biosciencejournal/article/view/3274310.14393/BJ-v33n1a2017-32743Bioscience Journal ; Vol. 33 No. 1 (2017): Jan./Feb.; 95-104Bioscience Journal ; v. 33 n. 1 (2017): Jan./Feb.; 95-1041981-3163reponame:Bioscience journal (Online)instname:Universidade Federal de Uberlândia (UFU)instacron:UFUenghttps://seer.ufu.br/index.php/biosciencejournal/article/view/32743/19754Brazil; ContemporaryCopyright (c) 2017 Diones Krinski, Luís Amilton Foersterhttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessKrinski, DionesFoerster, Luís Amilton2022-02-16T13:08:19Zoai:ojs.www.seer.ufu.br:article/32743Revistahttps://seer.ufu.br/index.php/biosciencejournalPUBhttps://seer.ufu.br/index.php/biosciencejournal/oaibiosciencej@ufu.br||1981-31631516-3725opendoar:2022-02-16T13:08:19Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)false
dc.title.none.fl_str_mv Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
Ataque simulado de insetos desfolhadores em arroz de terras altas cutivado na nova fronteira agrícola da floresta Amazônica (Brasil) e seu efeito sobre a produção de grãos
title Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
spellingShingle Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
Krinski, Diones
Integrated pest management
Economic damage level
Leaf area reduction
Rice crop
Agricultural Sciences
Krinski, Diones
Integrated pest management
Economic damage level
Leaf area reduction
Rice crop
Agricultural Sciences
title_short Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
title_full Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
title_fullStr Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
title_full_unstemmed Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
title_sort Simulated attack of defoliating insects on upland rice cultivated in new agricultural frontier from amazon rainforest region (Brazil) and its effect on grain production
author Krinski, Diones
author_facet Krinski, Diones
Krinski, Diones
Foerster, Luís Amilton
Foerster, Luís Amilton
author_role author
author2 Foerster, Luís Amilton
author2_role author
dc.contributor.author.fl_str_mv Krinski, Diones
Foerster, Luís Amilton
dc.subject.por.fl_str_mv Integrated pest management
Economic damage level
Leaf area reduction
Rice crop
Agricultural Sciences
topic Integrated pest management
Economic damage level
Leaf area reduction
Rice crop
Agricultural Sciences
description Simulation of the attack of defoliating insects provides a measurement of the level of damage that the crop can support at a given developmental stage and also allows to quantify the loss of productivity. This study evaluated the effects of increasing levels of artificial defoliation in upland rice plants under field conditions, on grain production at three phenological stages, vegetative stage V8 (collar formation in the 8th leaf of the main stem), vegetative stage V12 (formation of the flag leaf) and reproductive stage R3/R4 (liberation of the panicle or anthesis). The percentage of damage at all stages increased significantly from 25% defoliation, and was higher when defoliation occurred in V8 and V12. Defoliation levels up to 50% in the reproductive stage did not influence the quantity of filled grains, total spikelets per panicle and weight of filled grains per panicle, and thus the pest control is not required. The data show that the control of leaf-chewing insects in upland rice should be restricted to the vegetative stage.
publishDate 2017
dc.date.none.fl_str_mv 2017-02-09
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.ufu.br/index.php/biosciencejournal/article/view/32743
10.14393/BJ-v33n1a2017-32743
url https://seer.ufu.br/index.php/biosciencejournal/article/view/32743
identifier_str_mv 10.14393/BJ-v33n1a2017-32743
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://seer.ufu.br/index.php/biosciencejournal/article/view/32743/19754
dc.rights.driver.fl_str_mv Copyright (c) 2017 Diones Krinski, Luís Amilton Foerster
https://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2017 Diones Krinski, Luís Amilton Foerster
https://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv Brazil; Contemporary
dc.publisher.none.fl_str_mv EDUFU
publisher.none.fl_str_mv EDUFU
dc.source.none.fl_str_mv Bioscience Journal ; Vol. 33 No. 1 (2017): Jan./Feb.; 95-104
Bioscience Journal ; v. 33 n. 1 (2017): Jan./Feb.; 95-104
1981-3163
reponame:Bioscience journal (Online)
instname:Universidade Federal de Uberlândia (UFU)
instacron:UFU
instname_str Universidade Federal de Uberlândia (UFU)
instacron_str UFU
institution UFU
reponame_str Bioscience journal (Online)
collection Bioscience journal (Online)
repository.name.fl_str_mv Bioscience journal (Online) - Universidade Federal de Uberlândia (UFU)
repository.mail.fl_str_mv biosciencej@ufu.br||
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dc.identifier.doi.none.fl_str_mv 10.14393/BJ-v33n1a2017-32743

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