Fitoseidos (Acari: Phytoseiidae) en maíz y en vegetación en Ribazo en Navarra: densidades y composición de especies

IRAOLA, V. M.; MORAZA, M. L.; BIURRUN, F. y FERRAGUT, F., 1997: Phytoseid mites (Acari: Phytoseiidae) on corn and border vegetation on Navarra (Northern Spain). Density and species composition. Bol. San. Veg. Plagas, 23(2): 209-220. The present work identifies the predaceous phytoseid mites on Tetranychus turkestani on corn from Navarra, in the years 1992-1994. A total of 15 species have been found. Amblyseius californicus (McGregor) is the most abundant mite on corn and on the border vegetation, Euseius stipulatus (A.-H.) on corn and Amblyseius cucumeris (Oudemans) on Gramineae and on remains of the anterior corn crop. The phytoseid presence through corn life cycle has been determinated and the phytoseid density by vegetal species (the highest density is the corn too). Finally, the different composition of the phytoseid community it has been observed in the four implicated habitats: corn, remains of the anterior corn crop, gramineas and other border plants.