versão impressa ISSN 0365-2807
SALAZAR P, Ana María et al. Displacement of Conidia of Metarhizium anisopliae var. anisopliae in Columns of Three Soil Series. Agric. Téc. [online]. 2007, vol.67, n.3, pp.236-243. ISSN 0365-2807. http://dx.doi.org/10.4067/S0365-28072007000300002.
The fungus Metarhizium anisopliae isolation Qu-M270 is a promising control agent for the wheat white grub (Hylamorpha elegans 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
Palavras-chave : biological control; entomopathogenic fungus; infiltration; biopesticide.