ANTIFEEDING AND INSECTICIDE PROPERTIES OF AQUEOUS AND ETHANOLIC FRUIT EXTRACTS FROM Melia azedarach L. ON THE ELM LEAF BEETLE Xanthogaleruca luteola Muller

作者：Chiffelle Italo; Huerta Amanda^*; Azua Fernando; Puga Karla; Araya Jaime E

来源：Chilean Journal of Agricultural Research, 2011, 71(2): 218-225.

• Botanical insecticides
• ethanol extract
• water extract
• Ulmus

Xanthogaleruca luteola Muller (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 LC(50) 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 ethanol extracts, with a LC(50) of 0.9% w/v on the 3(rd) day after exposure, and 6.6% w/v on the 5(th) day with the water extract.

• 出版日期2011-6