EFFICACY OF PHYTOSEIID PREDATOR, Amblyseius tetranychivorus Evans AGAINST TWO SPOTTED SPIDER MITE, Tetranychus urticae Koch ON CARNATION
Two spotted spider mite, Terranyclms urticae Koch (Acarina : Tetranychidae) is a serious pest on carnation grown under polyhouse conditions (Jhansi Rani and Jagan Mohan, I997). The phytophagus mite infests carnation mainly on upper surface of leaves and in severe cases spreads to growing buds and ﬂowers. Damage by the mite results in discolouration and drying of infested plant parts. Reduced effectiveness and development of resistance (Shaila, H. M., 1999) to traditional acaricides (dicofol and wettable sulfur) necessiated exploration of other acaricides such as Vertimec (abamectin), Apollo (clofentazine), Mitac (amitraz), Cascade (flufenoxuron), etc. As these are very costly, an attempt was made to look for alternative and economic methods of control. So, an indigenous predatory mite, Amblyseius tetmnycliivorrzs Evans (Acarina ; Phytoseiidae) was evaluated for its efficacy against 71 urlicae on carnation under polyhouse conditions.
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