Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes

Detalhes bibliográficos
Autor(a) principal: Cruz, Ivan
Data de Publicação: 2014
Outros Autores: Vendramim, José Djair
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/13787
Resumo: The sorghum genotypes were planted in pots. Plants were covered with circular cages, made of a wire frame and a fine cloth. In the first experiments, using only the susceptible genotype (BR 601) plants were infested by placing a density of zero, five, ten, fifteen, 20 e 25 insects per plant eleven days following planting. The individuals were seven days old. The resistant genotype TX 2567 were included in the second experiment, using in this case zero, ten, 20 and 30 greenbugs per plant. Different plants were infested 16, 26 and 36 days following planting. Evaluations were based in a visual damage scale from zero (no damage) to nine (over 81% plant necrosis) and in the growth difference between infested and non-infested plants. It was concluded that under an initial infestation of ten greenbugs per plant the susceptible plants are killed in 21 days but the resistant ones, even with an initial infestation of 20 greenbugs per plant, stay alive at least for 28 days and with an increase in size of 68.6% in relation to uninfested plants. It was also concluded that resistant or susceptible plants, are able to stay alive for a longer period, under the same initial infestation, when the infestation occurs in older plants. 
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spelling Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypesEfeito de diferentes níveis de infestação pelo pulgão-verde, Schizaphis graminum (Rondani, 1852) em sorgo suscetível e sorgo resistentedamage; Sorghum; pests; host plant resistance to insectnível de dano; Sorghum; pragas; danos; resistência de plantas a insetosThe sorghum genotypes were planted in pots. Plants were covered with circular cages, made of a wire frame and a fine cloth. In the first experiments, using only the susceptible genotype (BR 601) plants were infested by placing a density of zero, five, ten, fifteen, 20 e 25 insects per plant eleven days following planting. The individuals were seven days old. The resistant genotype TX 2567 were included in the second experiment, using in this case zero, ten, 20 and 30 greenbugs per plant. Different plants were infested 16, 26 and 36 days following planting. Evaluations were based in a visual damage scale from zero (no damage) to nine (over 81% plant necrosis) and in the growth difference between infested and non-infested plants. It was concluded that under an initial infestation of ten greenbugs per plant the susceptible plants are killed in 21 days but the resistant ones, even with an initial infestation of 20 greenbugs per plant, stay alive at least for 28 days and with an increase in size of 68.6% in relation to uninfested plants. It was also concluded that resistant or susceptible plants, are able to stay alive for a longer period, under the same initial infestation, when the infestation occurs in older plants. Os genótipos de sorgo foram semeados em vasos, sendo as plantas protegidas com uma gaiola de armação de arame envolta de tecido fino (filó). No primeiro experimento, usando apenas o genótipo suscetível (BR 601) efetuou-se a infestação com uma densidade de pulgões de zero, cinco, dez, quinze, 20 e 25 indivíduos de sete dias de idade por planta, quando esta estava com onze dias após o plantio. Num segundo experimento, incluindo também o genótipo resistente TX 2567, utilizaram-se densidades de zero, dez, 20 e 30 pulgões por planta, com as infestações realizadas quando as plantas estavam com 16, 26 e 36 dias após o plantio. As avaliações basearam-se em uma escala de notas, de zero (nenhum dano) a nove (acima de 81% de necrose da planta) e na diferença do crescimento entre plantas infestadas e não infestadas. Concluiu-se que, quando sujeitas à infestação inicial a partir de dez pulgões por planta, as plantas suscetíveis morrem em 21 dias independentemente da época de infestação, enquanto as resistentes, mesmo com infestação inicial de 20 pulgões por planta, continuam vivas por um período mínimo de 28 dias e com incrementos médios no tamanho, de 68,6% em relação a plantas sem infestação. Também concluiu-se que tanto as plantas resistentes como as suscetíveis, suportam uma mesma infestação inicial por um período mais longo, quando a infestação ocorre em plantas mais desenvolvidas.Pesquisa Agropecuaria BrasileiraPesquisa Agropecuária BrasileiraCruz, IvanVendramim, José Djair2014-04-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://seer.sct.embrapa.br/index.php/pab/article/view/13787Pesquisa Agropecuaria Brasileira; v.23, n.2, fev. 1988; 111-118Pesquisa Agropecuária Brasileira; v.23, n.2, fev. 1988; 111-1181678-39210100-104xreponame:Pesquisa Agropecuária Brasileira (Online)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPAporhttps://seer.sct.embrapa.br/index.php/pab/article/view/13787/7826info:eu-repo/semantics/openAccess2014-09-05T17:35:21Zoai:ojs.seer.sct.embrapa.br:article/13787Revistahttp://seer.sct.embrapa.br/index.php/pabPRIhttps://old.scielo.br/oai/scielo-oai.phppab@sct.embrapa.br || sct.pab@embrapa.br1678-39210100-204Xopendoar:2014-09-05T17:35:21Pesquisa Agropecuária Brasileira (Online) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false
dc.title.none.fl_str_mv Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
Efeito de diferentes níveis de infestação pelo pulgão-verde, Schizaphis graminum (Rondani, 1852) em sorgo suscetível e sorgo resistente
title Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
spellingShingle Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
Cruz, Ivan
damage; Sorghum; pests; host plant resistance to insect
nível de dano; Sorghum; pragas; danos; resistência de plantas a insetos
title_short Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
title_full Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
title_fullStr Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
title_full_unstemmed Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
title_sort Effect of different infestation levels of the greenbug, Shizaphis graminum (Rondani, 1852) on susceptible and resistant sorghum genotypes
author Cruz, Ivan
author_facet Cruz, Ivan
Vendramim, José Djair
author_role author
author2 Vendramim, José Djair
author2_role author
dc.contributor.none.fl_str_mv

dc.contributor.author.fl_str_mv Cruz, Ivan
Vendramim, José Djair
dc.subject.por.fl_str_mv damage; Sorghum; pests; host plant resistance to insect
nível de dano; Sorghum; pragas; danos; resistência de plantas a insetos
topic damage; Sorghum; pests; host plant resistance to insect
nível de dano; Sorghum; pragas; danos; resistência de plantas a insetos
description The sorghum genotypes were planted in pots. Plants were covered with circular cages, made of a wire frame and a fine cloth. In the first experiments, using only the susceptible genotype (BR 601) plants were infested by placing a density of zero, five, ten, fifteen, 20 e 25 insects per plant eleven days following planting. The individuals were seven days old. The resistant genotype TX 2567 were included in the second experiment, using in this case zero, ten, 20 and 30 greenbugs per plant. Different plants were infested 16, 26 and 36 days following planting. Evaluations were based in a visual damage scale from zero (no damage) to nine (over 81% plant necrosis) and in the growth difference between infested and non-infested plants. It was concluded that under an initial infestation of ten greenbugs per plant the susceptible plants are killed in 21 days but the resistant ones, even with an initial infestation of 20 greenbugs per plant, stay alive at least for 28 days and with an increase in size of 68.6% in relation to uninfested plants. It was also concluded that resistant or susceptible plants, are able to stay alive for a longer period, under the same initial infestation, when the infestation occurs in older plants. 
publishDate 2014
dc.date.none.fl_str_mv 2014-04-17
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/13787
url https://seer.sct.embrapa.br/index.php/pab/article/view/13787
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/13787/7826
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.23, n.2, fev. 1988; 111-118
Pesquisa Agropecuária Brasileira; v.23, n.2, fev. 1988; 111-118
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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