Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The occurrence of two-spotted spider mite on plum trees and its control.

Abstract

Two-spotted spider mite (Tetranychus viennensis) [Amphitetranychus viennensis] is an important pest of plums in the Gutian area of Fujian province. Observations revealed it has 6-10 generations a year. The fertilized adults hibernate in gaps under the bark and in soil near the trunk base. When the mean day temperature rises to 10°C, the mites start to emerge and attack the young growing leaves. High temperatures and drought in summer increase the severity of the damage. Natural enemies can be used for control of the mite. When over-wintered adults are numerous on the leaves, usually at the flower falling stage, spraying with a 2500x dilution of 20% pyridaben wettable powder is also effective for control.