Pesticide Resistance in the Darmstadt Strain of Phvtoseiulus persimilis (Acarina: Phytoseiidae)

Abstract

Susceptibilities to five chemicals on two different strains of Phytoseiulus persimilis were compared. One was introduced from University of California, Riverside (UCR, susceptible), the other from “Biologische Bundesanstalt für Land-und Forstwirtschaft, Institut für biologische Schäd-lingsbekämpfung” Darmstadt, Federal Republic of Germany, in 1984 through the kindness of Dr. Sherif A. Hassan (Das, resistant). Susceptibilities to fenitrothion, carbaryl and chinomethionat were low in the DSA strain. However, susceptibility to acephate was the same and that to permethrin was very high in both strains. © 1986, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.