ARTÍCULO
TITULO

Comparative study of the relative abundance and diversity of coccinellids (Coleoptera: Coccinellidae) in blueberries (Vaccinium corymbosum L.) under two production systems in La Araucanía Region, Chile.

Marcela Vera    
Alfonso Aguilera    
Ramón Rebolledo    

Resumen

Coccinellids have been used, throughout the world, in biological control programs of agriculture pests. In Chile this family has been studied by various authors, which addresses issues such as biology, predatory activity and distribution in herbaceous species, shrubs and trees, but their situation in blueberries, where there is an abundance of species, is unknown Coccinellid beetles were counted visually on two blueberry orchards, under organic and conventional management. This study was conducted at the Maquehue Experiment Station, in the central valley of ?La Araucanía Region? in southern Chile, from September 2007 through May 2008 and was divided into two periods: from September 2007 through February 2008 with visual counts only on the foliage of the plants, and from March through May 2008 counts were done on the foliage and on of the plant in the soil around the plants. The greatest number of species was recorded in the organic garden in both sampling periods, but species diversity was the same for both production systems. Specify results better. En todo el mundo, los coccinélidos se han utilizado en programas de control biológico de plagas agrícolas. En Chile esta familia ha sido estudiada por diversos autores, que tratan aspectos de biología, actividad depredadora y distribución de las especies en substratos herbáceos, arbustivos y arbóreos, pero en arándano se desconoce la diversidad y abundancia de especies de esta familia. Se hizo un estudio mediante recuentos visuales en la Estación Experimental Maquehue de la Universidad de La Frontera, en la región de La Araucanía de los coccinélidos presentes en dos huertos de arándano, uno bajo manejo orgánico y otro bajo manejo convencional, desde septiembre de 2007 a mayo de 2008, dividido en dos periodos, de septiembre de 2007 a febrero de 2008, con recuentos sólo en el follaje de las plantas, y de marzo a mayo de 2008 tanto en el follaje como en el suelo alrededor de ellas. La mayor cantidad de especies se contabilizó en el huerto orgánico, en ambos períodos de muestreo, y la diversidad fue la misma para ambos huertos.

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