2005 年 2005 巻 56 号 p. 188-190
We released Neoseiulus californicus for the control of Tetranychus urticae in an apple orchard that was not treated with insecticides, and investigated the seasonal dynamics of spider mites, phytoseiid mites and predatory insects. N. californicus did not become established on the apple trees and did not decrease the T. urticae population. When the T. urticae population increased in mid-July, Onus minutus naturally became established in the orchard, and the population of T. urticae decreased below 0.1 adult females per leaf. These observations suggest that O. minutus is a candidate control agent for T. urticae on apple trees.