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vol.24 número2HÁBITOS DE CONSUMO DE CARNE BOVINA EN TEMUCO, IX REGIÓN DE CHILEATMÓSFERA MODIFICADA EN FRUTODEPEPINO DULCE índice de autoresíndice de materiabúsqueda de artículos
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Idesia (Arica)

versión On-line ISSN 0718-3429

Resumen

MEDEL M, Vivian; REBOLLEDO R, Ramón; KLEIN K, Carlos  y  AGUILERA P, Alfonso. POPULATION FLUCTUATION OF MITES ASSOCIATED WITH APPLE AND PEAR TREES IN THE CENTRAL PLAIN OF THE IX REGION OF LA ARAUCANIA, CHILE. Idesia [online]. 2006, vol.24, n.2, pp.25-33. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292006000200004.

The population dynamics of phytophagous and predatory mites was studied in a pear and apple orchard (without the application of recent pesticides), located in the central plain of La Araucanía (Chile), with the objective to determine mite diversity, as well as their abundance. For this purpose, pear and apple leaves were manually collected at two levels (medium and high). At each level 15 leaves (30 per tree) were collected and sampled with three repetitions per fruit species. The study was carried out during the season of 2000-2001 and 2001-2002. According to the results obtained, the diversity is similar for both fruit species. Three phytophagous Tetranychidae Tetranychus urticae, Panonychus ulmi and Bryobia rubrioculus were found, but only one predator the Chileseus camposi (Phytoseiidae). High populatios of Tydeidae and Acarididae mites were also found. The relative abundance of phytophagous mites and eggs, as well predators and the Acarididae mites were all higher on apples than pears, but on the latter more Tydeidae mites were observed. No significant differences were found regarding the abundance of mites at the two levels studied.

Palabras clave : Tetranychus urticae; Panonychus ulmi; Bryobia rubrioculus; Phytoseiidae; Chileseus camposi; diversity and relative abundance.

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