EFFICACY OF PHYTOSEIID PREDATOR, Amblyseius tetranychivorus Evans AGAINST TWO SPOTTED SPIDER MITE, Tetranychus urticae Koch ON CARNATION

B. JHANSI RANI

Abstract


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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