Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil

Detalhes bibliográficos
Autor(a) principal: Lamas, Fernando Mendes
Data de Publicação: 1999
Outros Autores: Athayde, Manoel Luiz Ferreira, Banzatto, David Ariovaldo, Fortuna, Paulo de Andrade
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/5507
Resumo: The objective of this study was to evaluate the effect of doses of mepiquat chloride, thidiazuron and ethephon on cotton (Gossypium hirsutum L.), applied in parcels, and were surveyed in Itamarati Farm at Ponta Porã county. The mepiquat chloride doses were: (0.0; 12.5 + 12.5 + 25.0 = 50.0; 25.0 + 25.0 + 25.0 = 75.0; 0.0 + 50.0 + 50.0 = 100.0; 12.5 + 62.5 + 50.0 = 125.0) g ha-1. The applications were made at 34, 47 and 63 days after emergence(DAE) in 1993/94 and at 42, 60 and 73 DAE in 1994/95. Thidiazuron was applied when 70% of bolls were opened at the doses 0.0, 45.0, 60.0 and 75.0 g ha-1. Ethephon was applied seven days after thidiazuron, when 85% defoliation was observed, in the doses of 0.0, 960.0 and 1,440.0 g ha-1. The experimental design used was strips with subdivided subparcelas. Mepiquat chloride decrease the number of unripe fruits, increased the weight of 100 seeds and the boll average weight. The defoliation percentage enhanced with increasing thidiazuron and ethephon doses. Mepiquat chloride x thidiazuron x ethephon interaction was significative to the percentage of opening bolls and production of cotton seed.
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spelling Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, BrazilCloreto de mepiquat, thidiazuron e ethephon aplicados no algodoeiro em Ponta Porã, MSGossypium hirsutum; growth regulator; defoliant; riperGossypium hirsutum; regulador de crescimento; desfolhante; maturadorThe objective of this study was to evaluate the effect of doses of mepiquat chloride, thidiazuron and ethephon on cotton (Gossypium hirsutum L.), applied in parcels, and were surveyed in Itamarati Farm at Ponta Porã county. The mepiquat chloride doses were: (0.0; 12.5 + 12.5 + 25.0 = 50.0; 25.0 + 25.0 + 25.0 = 75.0; 0.0 + 50.0 + 50.0 = 100.0; 12.5 + 62.5 + 50.0 = 125.0) g ha-1. The applications were made at 34, 47 and 63 days after emergence(DAE) in 1993/94 and at 42, 60 and 73 DAE in 1994/95. Thidiazuron was applied when 70% of bolls were opened at the doses 0.0, 45.0, 60.0 and 75.0 g ha-1. Ethephon was applied seven days after thidiazuron, when 85% defoliation was observed, in the doses of 0.0, 960.0 and 1,440.0 g ha-1. The experimental design used was strips with subdivided subparcelas. Mepiquat chloride decrease the number of unripe fruits, increased the weight of 100 seeds and the boll average weight. The defoliation percentage enhanced with increasing thidiazuron and ethephon doses. Mepiquat chloride x thidiazuron x ethephon interaction was significative to the percentage of opening bolls and production of cotton seed.O objetivo do presente estudo foi avaliar os efeitos de diferentes dosagens de cloreto de mepiquat, thidiazuron e ethephon, aplicadas parceladamente no algodoeiro (Gossypium hirsutum L.) na Fazenda Itamarati, Ponta Porã, MS. As dosagens de cloreto de mepiquat foram: (0; 12,5 + 12,5 + 25,0 = 50; 25 + 25 + 25 = 75; 0 + 50 + 50 = 100; 12,5 + 62,5 + 50 = 125) g ha-1, com aplicações efetuadas aos 34, 47 e 62 dias após a emergência (DAE) em 1993/94, e aos 42, 60 e 73 DAE, em 1994/95, enquanto o thidiazuron foi aplicado quando 70% dos capulhos estavam abertos, nas dosagens de 0, 45, 60 e 75 g ha-1; já o ethephon foi aplicado sete dias após o thidiazuron, quando já se observava desfolha de 85%, nas dosagens de 0, 960 e 1.440 g ha-1. O delineamento experimental utilizado foi o de blocos casualizados em faixa, com subparcelas subdivididas e quatro repetições. O cloreto de mepiquat proporcionou redução do número de frutos verdes, aumento do peso de 100 sementes e do peso médio de um capulho; a percentagem de desfolha aumentou com as dosagens de thidiazuron e ethephon; constatou-se que a interação cloreto de mepiquat x thidiazuron x ethephon foi significativa para percentagem de abertura de capulhos e produção de algodão em caroço.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraLamas, Fernando MendesAthayde, Manoel Luiz FerreiraBanzatto, David AriovaldoFortuna, Paulo de Andrade1999-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5507Pesquisa Agropecuaria Brasileira; v.34, n.10, out. 1999; 1871-1880Pesquisa Agropecuária Brasileira; v.34, n.10, out. 1999; 1871-18801678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5507/2698info:eu-repo/semantics/openAccess2012-02-13T11:38:31Zoai:ojs.seer.sct.embrapa.br:article/5507Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2012-02-13T11:38:31Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
Cloreto de mepiquat, thidiazuron e ethephon aplicados no algodoeiro em Ponta Porã, MS
title Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
spellingShingle Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
Lamas, Fernando Mendes
Gossypium hirsutum; growth regulator; defoliant; riper
Gossypium hirsutum; regulador de crescimento; desfolhante; maturador
title_short Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
title_full Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
title_fullStr Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
title_full_unstemmed Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
title_sort Mepiquat chloride, thidiazuron and ethephon applied on cotton in Ponta Porã, MS, Brazil
author Lamas, Fernando Mendes
author_facet Lamas, Fernando Mendes
Athayde, Manoel Luiz Ferreira
Banzatto, David Ariovaldo
Fortuna, Paulo de Andrade
author_role author
author2 Athayde, Manoel Luiz Ferreira
Banzatto, David Ariovaldo
Fortuna, Paulo de Andrade
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Lamas, Fernando Mendes
Athayde, Manoel Luiz Ferreira
Banzatto, David Ariovaldo
Fortuna, Paulo de Andrade
dc.subject.por.fl_str_mv Gossypium hirsutum; growth regulator; defoliant; riper
Gossypium hirsutum; regulador de crescimento; desfolhante; maturador
topic Gossypium hirsutum; growth regulator; defoliant; riper
Gossypium hirsutum; regulador de crescimento; desfolhante; maturador
description The objective of this study was to evaluate the effect of doses of mepiquat chloride, thidiazuron and ethephon on cotton (Gossypium hirsutum L.), applied in parcels, and were surveyed in Itamarati Farm at Ponta Porã county. The mepiquat chloride doses were: (0.0; 12.5 + 12.5 + 25.0 = 50.0; 25.0 + 25.0 + 25.0 = 75.0; 0.0 + 50.0 + 50.0 = 100.0; 12.5 + 62.5 + 50.0 = 125.0) g ha-1. The applications were made at 34, 47 and 63 days after emergence(DAE) in 1993/94 and at 42, 60 and 73 DAE in 1994/95. Thidiazuron was applied when 70% of bolls were opened at the doses 0.0, 45.0, 60.0 and 75.0 g ha-1. Ethephon was applied seven days after thidiazuron, when 85% defoliation was observed, in the doses of 0.0, 960.0 and 1,440.0 g ha-1. The experimental design used was strips with subdivided subparcelas. Mepiquat chloride decrease the number of unripe fruits, increased the weight of 100 seeds and the boll average weight. The defoliation percentage enhanced with increasing thidiazuron and ethephon doses. Mepiquat chloride x thidiazuron x ethephon interaction was significative to the percentage of opening bolls and production of cotton seed.
publishDate 1999
dc.date.none.fl_str_mv 1999-10-01
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/5507
url https://seer.sct.embrapa.br/index.php/pab/article/view/5507
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/5507/2698
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.34, n.10, out. 1999; 1871-1880
Pesquisa Agropecuária Brasileira; v.34, n.10, out. 1999; 1871-1880
1678-3921
0100-104x
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reponame_str Pesquisa Agropecuária Brasileira (Online)
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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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