Effect of Anacardium humile St. Hill

• Published in: Acta scientiarum. Agronomy Vol. 35; no. 4; p. 413
• Main Authors: Pistori, Melissa Gindri Bragato, Roel, Antonia Railda, Valerio, Jose Raul, Oliveira, Marlene Conceicao Monteiro, Grisoto, Eliane, Matias, Rosemary
• Format: Journal Article
• Language: Spanish
• Published: Universidade Estadual de Maringa 01-10-2013
• ISSN: 1679-9275
• DOI: 10.4025/actasciagron.v35i4.16597

The study of plant-derived substances for the control of insect pests is desirable in the attempt to discover less toxic insecticides that are safe for the environment. Indeed, extracts from the cashew of the savannah, Anacardium humile, have shown insecticidal activities against certain insects. The sugarcane root spittlebug Mahanarva fimbriolata is considered an important pest of sugarcane, causing severe damage and significant yield reductions. The aim of this study was to evaluate the effect of the aqueous extract of A. humile (0.05, 0.4 and 1.0%) on M. fimbriolata. The application of the aqueous extract of Anacardium humile resulted in 53.1% nymphal mortality at a concentration of 1.0%, which was significantly higher than that observed in the negative control. The nymphal period and longevity of M. fimbriolata, however, were not affected by the aqueous A. humile extract. Keywords: insecta, insecticidal plants, plant active ingredients, sugarcane pests. O estudo com substancias derivadas de plantas com potencial no controle de pragas justifica-se pela necessidade de se identificar compostos menos agressivos ao meio ambiente. Extratos do cajuzinhodo-cerrado, Anacardium humile tem mostrado potencial como inseticida sobre alguns insetos. A cigarrinhadas-raizes, Mahanarva fimbriolata e considerada praga importante na cultura da cana-de-acucar, ocasionando danos severos e sensivel reducao na producao. O objetivo deste trabalho foi avaliar o efeito do extrato aquoso de Anacardium humile, nas concentracoes 0,05; 0,4 e 1,0%, sobre M. fimbriolata, em cana-de-acucar. A acao do extrato aquoso resultou em mortalidade ninfal de 53,1% na concentracao 1,0%, valor significativamente superior aquele verificado na testemunha negativa. O periodo ninfal e longevidade de M. fimbriolata, no entanto, nao foram afetados pelo extrato aquoso. Palavras-chave: insecta, plantas inseticidas, principios ativos vegetais, pragas da cana-de-acucar.