Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa
Autor(a) principal: | |
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Data de Publicação: | 2011 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Semina. Ciências Agrárias (Online) |
Texto Completo: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383 |
Resumo: | The family Meliaceae has been identified as one of the most promising for biological control, as most species have biologically active compounds. Among the species, the Neem (Azadirachta indica A. Juss) is that stands out most for its efficiency and low toxicity, and it is utilized to control insects, fungi and nematodes. The aim of this work was to verify the allelopathic potential of aqueous extract of fresh leaves of Neem on germination of lettuce, soybeans, maize, beans and Bidens pilosa, as a way to control this weed. The extract was obtained by grinding 200g/L of fresh leaves of the Neem (considered extract 100%) and diluting in distilled water at concentrations of 80, 60, 40, and 20%, and a control with only water. The seeds were kept in the germination chamber at a temperature of 25°C, with photoperiod of 12 hours of light. The aqueous extract affected the germination percentage and average length root of lettuce, with values of 1% and 0.1, cm respectively. For the soybeans, the extract influenced negatively the average time of germination and average speed of germination. There was a drastic reduction of the average root length at higher concentration for soybean, corn and beans. For Bidens pilosa all the parameters analyzed were negatively affected, which means sensitivity to the extract. The bioassay performed in the laboratory showed that the aqueous extract of fresh leaves of Azadirachta indica has allelopathic effect on all species. |
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Semina. Ciências Agrárias (Online) |
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Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosaEfeito alelopático de extrato aquoso de folhas de Azadirachta indica A. Juss. em alface, soja, milho, feijão e picão-pretoAllelopathyNeemCropsWeeds.AlelopatiaNimPlantas cultivadasInvasora.The family Meliaceae has been identified as one of the most promising for biological control, as most species have biologically active compounds. Among the species, the Neem (Azadirachta indica A. Juss) is that stands out most for its efficiency and low toxicity, and it is utilized to control insects, fungi and nematodes. The aim of this work was to verify the allelopathic potential of aqueous extract of fresh leaves of Neem on germination of lettuce, soybeans, maize, beans and Bidens pilosa, as a way to control this weed. The extract was obtained by grinding 200g/L of fresh leaves of the Neem (considered extract 100%) and diluting in distilled water at concentrations of 80, 60, 40, and 20%, and a control with only water. The seeds were kept in the germination chamber at a temperature of 25°C, with photoperiod of 12 hours of light. The aqueous extract affected the germination percentage and average length root of lettuce, with values of 1% and 0.1, cm respectively. For the soybeans, the extract influenced negatively the average time of germination and average speed of germination. There was a drastic reduction of the average root length at higher concentration for soybean, corn and beans. For Bidens pilosa all the parameters analyzed were negatively affected, which means sensitivity to the extract. The bioassay performed in the laboratory showed that the aqueous extract of fresh leaves of Azadirachta indica has allelopathic effect on all species.A família Meliaceae foi identificada como um dos grupos mais promissores para o controle biológico, pois a maioria das espécies possui compostos biologicamente ativos. Dentre as espécies, o Nim (Azadirachta indica A. Juss.) é a que mais se destaca pela sua alta eficiência e baixa toxidade, empregada no controle de insetos, fungos e nematóides. O objetivo deste trabalho foi verificar o potencial alelopático do extrato aquoso de folhas frescas de Nim sobre a germinação de alface, soja, milho, feijão e picão-preto, como forma de controle dessa invasora. O extrato foi obtido através da trituração de 200 g/L de folhas frescas de Nim, considerado extrato 100%, e diluído em água destilada nas concentrações de 80, 60, 40 e 20%, além da testemunha com apenas água. As sementes foram mantidas em câmara de germinação à temperatura de 25°C, com fotoperíodo de 12 h de luz. O extrato aquoso prejudicou a porcentagem de germinação e comprimento médio de raiz de alface, que tiveram valores de 1% e 0,1cm respectivamente. Para soja, o extrato afetou negativamente o tempo médio de germinação e velocidade media de germinação. Houve redução drástica do comprimento médio de raiz à medida que aumentou a concentração para soja, milho e feijão. Para Bidens pilosa todos os parâmetros analisados foram afetados negativamente, demonstrando sensibilidade ao extrato. O bioensaio realizado em laboratório demonstrou que o extrato aquoso de folhas frescas de Azadirachta indica possui efeito alelopático sobre todas as espécies estudadas.UEL2011-07-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/mswordhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/338310.5433/1679-0359.2011v32n2p473Semina: Ciências Agrárias; Vol. 32 No. 2 (2011); 473-484Semina: Ciências Agrárias; v. 32 n. 2 (2011); 473-4841679-03591676-546Xreponame:Semina. Ciências Agrárias (Online)instname:Universidade Estadual de Londrina (UEL)instacron:UELporhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383/8407https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383/32691Rickli, Helena CristinaTeixeira Fortes, Andrea MariaSiberti da Silva, Paulo SérgioPilatti, Daiane MariaHutt, Daniele Reginainfo:eu-repo/semantics/openAccess2016-03-09T17:00:21Zoai:ojs.pkp.sfu.ca:article/3383Revistahttp://www.uel.br/revistas/uel/index.php/semagrariasPUBhttps://ojs.uel.br/revistas/uel/index.php/semagrarias/oaisemina.agrarias@uel.br1679-03591676-546Xopendoar:2016-03-09T17:00:21Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL)false |
dc.title.none.fl_str_mv |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa Efeito alelopático de extrato aquoso de folhas de Azadirachta indica A. Juss. em alface, soja, milho, feijão e picão-preto |
title |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
spellingShingle |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa Rickli, Helena Cristina Allelopathy Neem Crops Weeds. Alelopatia Nim Plantas cultivadas Invasora. |
title_short |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
title_full |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
title_fullStr |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
title_full_unstemmed |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
title_sort |
Allelopathic effect of aqueous extract of Azadirachta indica A. Juss. on lettuce, soybeans, maize, beans and Bidens pilosa |
author |
Rickli, Helena Cristina |
author_facet |
Rickli, Helena Cristina Teixeira Fortes, Andrea Maria Siberti da Silva, Paulo Sérgio Pilatti, Daiane Maria Hutt, Daniele Regina |
author_role |
author |
author2 |
Teixeira Fortes, Andrea Maria Siberti da Silva, Paulo Sérgio Pilatti, Daiane Maria Hutt, Daniele Regina |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Rickli, Helena Cristina Teixeira Fortes, Andrea Maria Siberti da Silva, Paulo Sérgio Pilatti, Daiane Maria Hutt, Daniele Regina |
dc.subject.por.fl_str_mv |
Allelopathy Neem Crops Weeds. Alelopatia Nim Plantas cultivadas Invasora. |
topic |
Allelopathy Neem Crops Weeds. Alelopatia Nim Plantas cultivadas Invasora. |
description |
The family Meliaceae has been identified as one of the most promising for biological control, as most species have biologically active compounds. Among the species, the Neem (Azadirachta indica A. Juss) is that stands out most for its efficiency and low toxicity, and it is utilized to control insects, fungi and nematodes. The aim of this work was to verify the allelopathic potential of aqueous extract of fresh leaves of Neem on germination of lettuce, soybeans, maize, beans and Bidens pilosa, as a way to control this weed. The extract was obtained by grinding 200g/L of fresh leaves of the Neem (considered extract 100%) and diluting in distilled water at concentrations of 80, 60, 40, and 20%, and a control with only water. The seeds were kept in the germination chamber at a temperature of 25°C, with photoperiod of 12 hours of light. The aqueous extract affected the germination percentage and average length root of lettuce, with values of 1% and 0.1, cm respectively. For the soybeans, the extract influenced negatively the average time of germination and average speed of germination. There was a drastic reduction of the average root length at higher concentration for soybean, corn and beans. For Bidens pilosa all the parameters analyzed were negatively affected, which means sensitivity to the extract. The bioassay performed in the laboratory showed that the aqueous extract of fresh leaves of Azadirachta indica has allelopathic effect on all species. |
publishDate |
2011 |
dc.date.none.fl_str_mv |
2011-07-12 |
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://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383 10.5433/1679-0359.2011v32n2p473 |
url |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383 |
identifier_str_mv |
10.5433/1679-0359.2011v32n2p473 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383/8407 https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/3383/32691 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/msword |
dc.publisher.none.fl_str_mv |
UEL |
publisher.none.fl_str_mv |
UEL |
dc.source.none.fl_str_mv |
Semina: Ciências Agrárias; Vol. 32 No. 2 (2011); 473-484 Semina: Ciências Agrárias; v. 32 n. 2 (2011); 473-484 1679-0359 1676-546X reponame:Semina. Ciências Agrárias (Online) instname:Universidade Estadual de Londrina (UEL) instacron:UEL |
instname_str |
Universidade Estadual de Londrina (UEL) |
instacron_str |
UEL |
institution |
UEL |
reponame_str |
Semina. Ciências Agrárias (Online) |
collection |
Semina. Ciências Agrárias (Online) |
repository.name.fl_str_mv |
Semina. Ciências Agrárias (Online) - Universidade Estadual de Londrina (UEL) |
repository.mail.fl_str_mv |
semina.agrarias@uel.br |
_version_ |
1750315408376725504 |