Abstracto

Management of Citrus psylla (Diaphorina Citri Kuwayama) Using Bio-Rational Insecticides.

G Sarada, K Gopa, T Nagalakshmi, KT Venkataramana, L Mukundalakshmi, T Gouri Sankar and V Gopi.

Asian citrus psylla(ACP), Diaphorina citri Kuwayama is a Homopteran insect pest, feeds on the phloem of citrus spp. and other related Rutaceous plants. Haunglogbing (HLB), better known as citrus greening, the deadly disease is being transmitted by this psyllid.The insecticidal evaluation is being carried out on three years aged sweet orange (Sathgudi) plants at Citrus research Station, Tirupati during 2011 and 2012, with seven treatments replicated three times. The treatments were imposed during peak pest infestation period (December –March). All the treatments recorded low ACP population than control irrespective of the year and days after treatment. However during both the years novaluron10EC (0.005%) recorded highest (80%) pest control at 7DAS. This was on par with azadirachtin (1%) and dimethoate30EC (0.06%, standard check). At 14DAS also the same chemicals have shown superior performance with >70% pest control. The effectiveness of the insecticides were in the order of novaluron> azadirachtin> dimethoate> Verticilliun lecanii> neem oil> abamectin.