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2 results on '"Cléia Gomes Vieira Silva"'

1. Insecticidal activity of the ethanolic extract from Croton species against Plutella xylostella L. (Lepidoptera: Plutellidae)

Author

Cléia Gomes Vieira Silva, José Candido Selva de Oliveira, and Claudio Augusto Gomes da Camara

Subjects
Croton spp., Botanical insecticide, Diamondback moth, Agriculture, Agriculture (General), S1-972
Abstract

The objective of this work was to study the effect of ethanolic extracts from different parts of Crotonspecies on the diamondback moth (Plutella xylostella L.). Extracts from the leaves of Croton rhamnifoliusH.B.K., Croton jacobinensis Baill., Croton sellowii Baill. and Croton micans Muell. C. rhamnifolius had the most lethal effect (LC50 = 14.95 μg mL-1), followed by C. rhamnifolius (stem), C. jacobinensis (stem),C. jacobinensis (leaf), C. sellowii (leaf) and C. sellowii (stem) with LC50 values of 42.40, 116.21, 183.85, 801.36 and 1252 μg mL-1, respectively. Plutella xylostella larvae fed kale disks with all extracts, exceptC. sellowii (stem), exhibited prolonged larval duration. None of the extracts affected the duration of the pupal stage of the moth.

Published
2018
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2. Composition and Insecticidal Activity of the Essential Oil ofCroton grewioidesBaill. against Mexican Bean Weevil (Zabrotes subfasciatusBoheman)

Author

José Vargas de Oliveira, Hugo Bolsoni Zago, Manfred O. E. Schwartz, Cléia Gomes Vieira Silva, Reginaldo Barros, Hugo José Gonçalves dos Santos Junior, Claudio A. G. da Camara, and Maria de Fatima de Araujo Lucena

Subjects
biology, Phenylpropanoid, Chemistry, Euphorbiaceae, food and beverages, General Chemistry, Bean weevil, biology.organism_classification, Croton, law.invention, chemistry.chemical_compound, Isoeugenol, Methyl eugenol, law, Botany, Cadalene, Essential oil
Abstract

The essential oils of leaves and stems of Croton grewioides Baill. of the “agreste” region of Pernambuco, Brazil, were obtained by hydrodistillation and analyzed by GC and GC/MS. Twenty-two components were identified, which represented 99.8% and 98.6% of the total constituents in the leaf and stem oil, respectively. Croton grewioides produced an oil with a predominance of phenylpropanoid compounds, whose principal component was (E)-anethole (65.5% in the leaf and 47.8% in the stem). Other major components found in the leaf oil were methyl eugenol (10.6%) and (E)-methyl isoeugenol (4.7%). Other components identified in the stem oil were (E)-methyl isoeugenol (30.0%), cadalene (8.4%) and methyl eugenol (4.6%). The insecticidal activity of C. grewioides was evaluated against Mexican bean weevils, Zabrotes subfaciatus (Boheman) resulting in a LC50 for the leaf oil, which was 3.4 times less than that obtained from the stem oil.

Published
2008
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