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Insecticide effects of Ruta graveolens, Copaifera langsdorffii and Chenopodium ambrosioides against pests and natural enemies in commercial tomato plantation - doi: 10.4025/actasciagron.v33i1.5900 Agronomy
Barbosa, Flávia Silva; Universidade Federal de Minas Gerais; Leite, Germano Leão Demolin; Universidade Federal de Minas Gerais; Alves, Sérgio Monteze; Universidade Federal de Minas Gerais; Nascimento, Aline Fonseca; Universidade Federal de Minas Gerais; D'Ávila, Vinícius de Abreu; Universidade Federal de Minas Gerais; Costa, Cândido Alves da; Universidade Federal de Minas Gerais.
The aim of this study was to evaluate the insecticide effect of watery leaf extracts of Ruta graveolens (Rutaceae), alcoholic leaf extracts of Copaifera langsdorffii (Caesalpinaceae) and Chenopodium ambrosioides (Chenopodiaceae) in the concentration of 5% under field conditions. The experiment design was randomized blocks with six replications. The parcels treated with plant extracts showed reduction in the population of pests when compared with the control parcels. The extract elaborated with C. langsdorffii presented greater insecticidal effect under Bemisia tabaci (Hemiptera: Aleyrodidae) and sum of pests. It was verified that after 24 hours of spraying, the parcels treated with the extract of C. ambrosioides presented minor numbers of adults of Tuta...
Tipo: Pesquisa científica em condições de campo Palavras-chave: 5.01.02.00-1 Lycopersicon esculentum; Bioinsecticide; Alternative control 5.01.02.02-8 Lycopersicon esculentum; Bioinsecticide; Alternative control.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5900
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Toxicity of extracts of Cyperus rotundus on Diabrotica speciosa - doi: 10.4025/actasciagron.v33i4.6902 Agronomy
Barbosa, Flávia Silva; Universidade Federal de Minas Gerais; Leite, Germano Leão Demolin; Universidade Federal de Minas Gerais; Paulino, Marney Aparecida de Oliveira; Universidade Federal de Minas Gerais; Guilherme, Denilson de Oliveira; Universidade Federal de Minas Gerais; Maia, Janini Tatiane Lima Souza; Universidade Federal de Minas Gerais; Fernandes, Rodrigo Carvalho; Universidade Federal de Minas Gerais.
The objective of this work was to evaluate the insecticidal effect or repellency of Cyperus rotundus, an important weed plant, through alternative methods of extraction, on Diabrotica speciosa, a pest that affects several plant species. The experimental design was completely casual, and consisted of five repetitions. The C. rotundus extracts were prepared using leaves and roots by alcoholic extraction, aqueous (hot water) extraction and aqueous (cold water) extraction and diluted to four different concentrations (0, 5, 10, and 15% of the volume of each extract). These dilutions were then tested and compared with a control. The higher mortality of D. speciosa adults as well as a smaller leaf consumption area were observed after treatments with increasing...
Tipo: Pesquisa Empírica de laboratório Palavras-chave: 5.01.02.00-1 Rootworm; Nutgrass; Chrysomelidae; Alternative control 5.01.02.02-8 Rootworm; Nutgrass; Chrysomelidae; Alternative control.
Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/6902
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