Behavior of lines from cotton primitive race stocks to attack of the boll weevil

Detalhes bibliográficos
Autor(a) principal: Farias, Francisco José Correia
Data de Publicação: 1999
Outros Autores: Lukefahr, Maurice James, Costa, Joaquim Nunes da, Freire, Elêusio Curvelo
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/5559
Resumo: The goal of the boll weevil (Anthonomus grandis Boheman) resistance program of Embrapa-Centro Nacional de Pesquisa de Algodão is to obtain cultivars that give 80% suppression when compared to commercial cultivars. The primitive cottons (Gossypium hirsutum L.) from Mexico and Central America have been known to show measurable levels of resistance to the boll weevil. In 1991 and 1992, the lines in BC1F5 and BC1F6 from Texas 277, Texas 326, Texas 1180, Texas 297, Texas 339, Texas 766 and Texas 1134 were evaluated to boll weevil resistance. The experiment was carried out at Campina Grande, PB, Brazil. The trial utilized was RCB with six replications. The plots were infested with newly emerged adults at the rate of 10,000 adults/ha. Six days after adults were released, the plots were sprayed with Cipermethrim. Infestation counts started three weeks after the Cipermethrim application and were made at weekly intervals. Five infestation counts were conducted by collecting 33 squares at random from each plot. The highest levels of resistance occurred in Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 and Texas 339 with 44.0, 41.2, 32.0, 40.4 and 36.4% of attack reduction, respectively, in relation to control CNPA 6H.
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spelling Behavior of lines from cotton primitive race stocks to attack of the boll weevilComportamento de progênies oriundas de raças primitivas de algodão herbáceo frente ao ataque do bicudohost resistance; breeding; Gossypiumresistência do hospedeiro; melhoramento; GossypiumThe goal of the boll weevil (Anthonomus grandis Boheman) resistance program of Embrapa-Centro Nacional de Pesquisa de Algodão is to obtain cultivars that give 80% suppression when compared to commercial cultivars. The primitive cottons (Gossypium hirsutum L.) from Mexico and Central America have been known to show measurable levels of resistance to the boll weevil. In 1991 and 1992, the lines in BC1F5 and BC1F6 from Texas 277, Texas 326, Texas 1180, Texas 297, Texas 339, Texas 766 and Texas 1134 were evaluated to boll weevil resistance. The experiment was carried out at Campina Grande, PB, Brazil. The trial utilized was RCB with six replications. The plots were infested with newly emerged adults at the rate of 10,000 adults/ha. Six days after adults were released, the plots were sprayed with Cipermethrim. Infestation counts started three weeks after the Cipermethrim application and were made at weekly intervals. Five infestation counts were conducted by collecting 33 squares at random from each plot. The highest levels of resistance occurred in Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 and Texas 339 with 44.0, 41.2, 32.0, 40.4 and 36.4% of attack reduction, respectively, in relation to control CNPA 6H.Com o objetivo de obter linhagens resistentes ao bicudo-do-algodoeiro (Anthonomus grandis Boheman), a Embrapa-Centro Nacional de Pesquisa de Algodão vem testando progênies oriundas de raças primitivas de algodoeiro herbáceo (Gossypium hirsutum L.) originárias do México e da América Central, que apresentam níveis aceitáveis de resistência ao bicudo. Em 1991 e 1992, as progênies em BC1F5 e BC1F6 oriundas das linhagens Texas 277, Texas 326 e Texas 1180, Texas 297, Texas 339, Texas 766 e Texas 1134, foram avaliadas com relação à resistência ao bicudo. O delineamento experimental utilizado foi o de blocos ao acaso, com seis repetições. A unidade experimental foi constituída por duas fileiras de 5 m, sob um espaçamento de 0,75 m x 0,20 m. As parcelas foram infestadas com adultos do bicudo recém-emergidos, a uma taxa de 10.000 adultos/ha. Aos seis dias após a liberação dos adultos, as parcelas foram pulverizadas com Cipermethrim, sendo realizadas em intervalos semanais. Foram procedidas cinco avaliações através da coleta de 33 botões florais ao acaso, por parcela. Os maiores níveis de resistência ao bicudo foram obtidos pelas progênies Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 e Texas 339, com redução de ataque de 44,0, 41,2, 32,0, 40,4 e 36,4%, respectivamente, em relação à testemunha CNPA 6H.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraFarias, Francisco José CorreiaLukefahr, Maurice JamesCosta, Joaquim Nunes daFreire, Elêusio Curvelo1999-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/5559Pesquisa Agropecuaria Brasileira; v.34, n.12, dez. 1999; 2235-2240Pesquisa Agropecuária Brasileira; v.34, n.12, dez. 1999; 2235-22401678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/5559/2750info:eu-repo/semantics/openAccess2010-06-29T16:28:34Zoai:ojs.seer.sct.embrapa.br:article/5559Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2010-06-29T16:28:34Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Behavior of lines from cotton primitive race stocks to attack of the boll weevil
Comportamento de progênies oriundas de raças primitivas de algodão herbáceo frente ao ataque do bicudo
title Behavior of lines from cotton primitive race stocks to attack of the boll weevil
spellingShingle Behavior of lines from cotton primitive race stocks to attack of the boll weevil
Farias, Francisco José Correia
host resistance; breeding; Gossypium
resistência do hospedeiro; melhoramento; Gossypium
title_short Behavior of lines from cotton primitive race stocks to attack of the boll weevil
title_full Behavior of lines from cotton primitive race stocks to attack of the boll weevil
title_fullStr Behavior of lines from cotton primitive race stocks to attack of the boll weevil
title_full_unstemmed Behavior of lines from cotton primitive race stocks to attack of the boll weevil
title_sort Behavior of lines from cotton primitive race stocks to attack of the boll weevil
author Farias, Francisco José Correia
author_facet Farias, Francisco José Correia
Lukefahr, Maurice James
Costa, Joaquim Nunes da
Freire, Elêusio Curvelo
author_role author
author2 Lukefahr, Maurice James
Costa, Joaquim Nunes da
Freire, Elêusio Curvelo
author2_role author
author
author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Farias, Francisco José Correia
Lukefahr, Maurice James
Costa, Joaquim Nunes da
Freire, Elêusio Curvelo
dc.subject.por.fl_str_mv host resistance; breeding; Gossypium
resistência do hospedeiro; melhoramento; Gossypium
topic host resistance; breeding; Gossypium
resistência do hospedeiro; melhoramento; Gossypium
description The goal of the boll weevil (Anthonomus grandis Boheman) resistance program of Embrapa-Centro Nacional de Pesquisa de Algodão is to obtain cultivars that give 80% suppression when compared to commercial cultivars. The primitive cottons (Gossypium hirsutum L.) from Mexico and Central America have been known to show measurable levels of resistance to the boll weevil. In 1991 and 1992, the lines in BC1F5 and BC1F6 from Texas 277, Texas 326, Texas 1180, Texas 297, Texas 339, Texas 766 and Texas 1134 were evaluated to boll weevil resistance. The experiment was carried out at Campina Grande, PB, Brazil. The trial utilized was RCB with six replications. The plots were infested with newly emerged adults at the rate of 10,000 adults/ha. Six days after adults were released, the plots were sprayed with Cipermethrim. Infestation counts started three weeks after the Cipermethrim application and were made at weekly intervals. Five infestation counts were conducted by collecting 33 squares at random from each plot. The highest levels of resistance occurred in Texas 326-95-1, Texas 277-87-5, Texas 1180-99-2, Texas 297 and Texas 339 with 44.0, 41.2, 32.0, 40.4 and 36.4% of attack reduction, respectively, in relation to control CNPA 6H.
publishDate 1999
dc.date.none.fl_str_mv 1999-12-01
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/5559
url https://seer.sct.embrapa.br/index.php/pab/article/view/5559
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/5559/2750
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.12, dez. 1999; 2235-2240
Pesquisa Agropecuária Brasileira; v.34, n.12, dez. 1999; 2235-2240
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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