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Agricultura Técnica
Instituto de Investigaciones Agropecuarias, INIA
ISSN: 0365-2807
EISSN: 0365-2807
Vol. 67, No. 3, 2007, pp. 236-243
Bioline Code: at07029
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Agricultura Técnica, Vol. 67, No. 3, 2007, pp. 236-243

 es Desplazamiento de conidias de Metarhizium anisopliae var. anisopliae check for this species in other resources en columnas de tres series de suelo
Salazar, Ana María P.; Gerding, Macarena G.; France, Andrés I.; Campos, Jorge P.; Gerding, Marcos P. & Sandoval, Marco E.

Resumen

El hongo entomopatógeno Metarhizium anisopliae check for this species in other resources , aislamiento Qu-M270, es específico para el control del gusano blanco del trigo ( Hylamorpha elegans check for this species in other resources Burm.), el cual se alimenta de raíces de diversos cultivos y se desplaza en el perfil del suelo hasta los 25 cm de profundidad. En este estudio se evaluó el desplazamiento vertical de conidias de Qu-M270, en suspensión acuosa, a través de columnas de suelo extraídas con tubos de PVC de 30 cm de largo y 20 cm de diámetro, en tres series de suelo de la Región del Bío-Bío (36°32' lat. Sur; 71°55' long. Oeste), Chile. La recuperación de conidias se realizó en medio especifico para Metarhizium anisopliae, contabilizando unidades formadoras de colonias por gramo de suelo seco. La serie Quella (Aquic Durixerets) fue más restrictiva al paso de conidias, las que se concentraron en los primeros 10 cm de profundidad, a diferencia de la serie Arenales (Dystric Xeropsamments) en que se observó su presencia bajo los 15 cm y en los líquidos percolados. La serie Mirador (Ultic Palexeralf) presentó una distribución uniforme a lo largo de todo el perfil.

Palabras-clave
control biológico, hongo entomopatógeno, infiltración, Hylamorpha elegans, biopesticida.

 
 en Displacement of conidia of Metarhizium anisopliae var. anisopliae in columns of three soil series
Salazar, Ana María P.; Gerding, Macarena G.; France, Andrés I.; Campos, Jorge P.; Gerding, Marcos P. & Sandoval, Marco E.

Abstract

The fungus Metarhizium anisopliae check for this species in other resources isolationQu-M270 is a promising control agent for the wheat white grub( Hylamorpha elegans check for this species in other resources Burm.), a Chilean scarabeid species whose larvae feed on roots of diverse crops and move in soil up to a depth of 25 cm. In this study, the vertical movement of Qu- M270 conidias suspended in water was evaluated in three soil series from the Bío-Bío Region (36°32' S lat; 71°55' W long), Chile. Soil was obtained using PVC pipes 30 cm long by 20 cm in diameter. Conidia recovery was performed in a specific medium for Metarhizium anisopliae, by counting colony forming units in 1 g of dry soil. The Quella series (Aquic Durixerets) was more restrictive to the percolation of conidia, which were concentrated at the first 10 cm. With the Arenales series (Dystric Xeropsamments), conidia were found below 15 cm and in percolated liquids. On the other hand, the Mirador series (Ultic Palexeralf) had a uniform distribution of conidia at every depth.

Keywords
biological control, entomopathogenic fungus, infiltration, Hylamorpha elegans, biopesticide

 
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