Toxicity and application of neem in fall armyworm

Silva, Marcílio Souza; Broglio, Sônia Maria Forti; Prédes Trindade, Roseane Cristina; Ferrreira, Emerson Santos; Gomes, Ismael Barros; Micheletti, Lígia Broglio

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dc.creator	Silva, Marcílio Souza
dc.creator	Broglio, Sônia Maria Forti
dc.creator	Prédes Trindade, Roseane Cristina
dc.creator	Ferrreira, Emerson Santos
dc.creator	Gomes, Ismael Barros
dc.creator	Micheletti, Lígia Broglio
dc.date	2015-12-29
dc.date.accessioned	2022-03-21T20:07:34Z
dc.date.available	2022-03-21T20:07:34Z
dc.identifier	https://comunicatascientiae.com.br/comunicata/article/view/808
dc.identifier	10.14295/cs.v6i3.808
dc.identifier.uri	http://biblioteca-repositorio.clacso.edu.ar/handle/CLACSO/77726
dc.description	Aqueous extracts of neem, Azadirachta indica A. Juss., leaf and seed cake were tested for toxicity in Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) utilizing different methods of application (foliar and systemic). Probit analysis was used to determine the LC50 and regression analysis for mortality at different concentrations of the extracts (0.5%, 1.0%, 1.5%, 2.0% and control treatment). Two caterpillar morphometric variables (larval length and cephalic capsule width) and the scale of damage of attacked plants were measured and, analyzed using the Kruskal-Wallis test (P<0.05). The LC50 values for neem seed cake and leaves were 0.13% and 0.25%, respectively. For larval length and cephalic capsule width, the larvae were more affected to the seed cake extract than leaf extract, however there was no significant difference between the methods of application for these variables. There was no difference in the scale of damage by the extracts and the methods of application analyzed. Both methods of application provided similar results and, the main differences were associated with more efficient of the seed cake extract.	en-US
dc.description	Aqueous extracts of neem, Azadirachta indica A. Juss., leaf and seed cake were tested for toxicity in Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) utilizing different methods of application (foliar and systemic). Probit analysis was used to determine the LC50 and regression analysis for mortality at different concentrations of the extracts (0.5%, 1.0%, 1.5%, 2.0% and control treatment). Two caterpillar morphometric variables (larval length and cephalic capsule width) and the scale of damage of attacked plants were measured and, analyzed using the Kruskal-Wallis test (H=16.93; P=0.0304). The LC50 values for neem seed cake and leaves were 0.13% and 0.25%, respectively. For larval length and cephalic capsule width, the larvae were more affected to the seed cake extract than leaf extract, however there was no significant difference between the methods of application for these variables. There was no difference in the scale of damage by the extracts and the methods of application analyzed. Both methods of application provided similar results and, the main differences were associated with more efficient of the seed cake extract.	pt-BR
dc.format	application/pdf
dc.language	eng
dc.publisher	Federal University of Piauí	en-US
dc.relation	https://comunicatascientiae.com.br/comunicata/article/view/808/354
dc.rights	Copyright (c) 2016 Marcílio Souza Silva, Sônia Maria Forti Broglio, Roseane Cristina Prédes Trindade, Emerson Santos Ferrreira, Ismael Barros Gomes, Lígia Broglio Micheletti	en-US
dc.source	Comunicata Scientiae; Vol. 6 No. 3 (2015); 359-364	en-US
dc.source	Comunicata Scientiae; v. 6 n. 3 (2015); 359-364	pt-BR
dc.source	2177-5133
dc.source	2176-9079
dc.source	10.14295/cs.v6i3
dc.subject	caterpillar	en-US
dc.subject	control	en-US
dc.subject	residue	en-US
dc.subject	Zea mays	en-US
dc.subject	caterpillar	pt-BR
dc.subject	control	pt-BR
dc.subject	residue	pt-BR
dc.subject	Zea mays	pt-BR
dc.title	Toxicity and application of neem in fall armyworm	en-US
dc.title	Toxicity and application of neem in fall armyworm	pt-BR
dc.type	info:eu-repo/semantics/article
dc.type	info:eu-repo/semantics/publishedVersion