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Chiffelle,Italo; Huerta,Amanda; Azúa,Fernando; Puga,Karla; Araya,Jaime E. |
Xanthogaleruca luteola Müller (Coleoptera: Chrysomelidae), a defoliator of Ulmus species currently present in several regions of central Chile, causes severe damage to trees, mainly in park areas, street tree-lines and gardens. The antifeeding and insecticidal activities of extracts from immature fruit of Melia azedarach L. (Meliaceae) were determined on adults of X. luteola in laboratory bioassays. Several concentrations of the extracts obtained with water and ethanol were used and their effectiveness and LC50 were determined. The antifeeding action of the water extracts caused 100% deterrence over concentrations of 3.6% w/v. Both extracts were effective insecticides against adults, causing 86% mortality (2.4% w/v), with a better performance of the... |
Tipo: Journal article |
Palavras-chave: Botanical insecticides; Ethanol extract; Water extract. |
Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200006 |
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Huerta,Amanda; Faúndez,Miguel; Araya,Jaime E. |
To determine the susceptibility of important species of eucalypt trees in Chile to Glycaspis brimblecombei Moore (Hemiptera: Psyllidae), an insect that was detected on Eucafyptus camaldulensis Dehn. in 2002 in Santiago, which causes defoliation of trees affected, and even their death in severe infestations, a field evaluation of an induced infestation was performed in 2004 of one-year-old plants of E. camaldulensis, E. nitens Deane & Maiden, and E. globulus Labill Growths of infested plants were compared with uninfested controls, using destructive sampling at 15, 30, 45, and 60 days. Also, observations were made regarding the duration of the development stages of the insect during two generations. The only species that was susceptible to the... |
Tipo: Journal article |
Palavras-chave: Eucalyptus camaldulensis; Eucalyptus globulus; Eucalyptus nitens; Glycaspis brimblecombei; Red gum lerp psyllid. |
Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200003 |
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