BIO-ECOLOGY AND CONTROL OF PSYLLA, Diaphorina citri Kuwayama INFESTING KAGZI LIME
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Date
2002
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AAU, Anand
Abstract
Various studies were carried out on development of psylla, Diaphorvmcitri Kuwayama under different biotic and abiotic conditions and it's non-pesticidal management using various plant species having insecticidal properties and different azadirachtin based formulations at Gujarat Agricultural University, Campus Anand during 2000 to 2002. The developmental period of egg, nymphal and adult, reproduction period, fecundity and lifespan of D. citri remained shorter during monsoon days, whereas egg hatching was observed higher during monsoon season. The nymphal development of D. citri took longer time to reach adult stage on Adenima lime than Seedless lime, Tirupati lime, Maxican lime, Coorg lime and Kagzi lime. Among the nine plant species tested for their insecticidal properties against D. citri, neem (Azadirachta indica A Joss) seed kernel 5% suspension found most effective against D. citri. Three per cent neem seed kernel suspension and leaf extract suspension of neem and ardusi (Adhatoda vasica Nees.) showed higher ovipositional deterrent property against D. citri. The nymphal period, female lifespan and egg hatching were influenced by higher (3.0%) concentration of neem seed kernel suspension and neem leaf extract suspension, whereas reproduction period, fecundity and male lifespan were not influenced by higher (3.0%) concentration. Among the four azadirachtin based formulations studied for management of D. citri, Neemazal 5% w/w (0.0015% azadirachtin) showed its higher effectiveness against psylla, D. citri.
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AGRICULTURAL ENTOMOLOGY, AGRICULTURE, A STUDY