author(s)
Sahadat Hossain and M Khalequzzaman

abstract
The present study was carried out to investigate the repellent activity and ovicidal deterrence effect of methanolic (CH3OH) extracts of leaves of Azadirachta indica A. Juss., Persicaria hydropiper (Linn.) Spach and Vitex negundo Linn. against the melon fruit fly, Bactrocera cucurbitae (Coquillett) in the Crop Protection and Toxicology Laboratory, University of Rajshahi, Bangladesh, during November 2016 to October 2017. In repellent activity test, only the leaf extract of A. indica offered significant repellency at 5% level of significance (P<0.05); however, the extracts of P. hydropiper and V. negundo did not show any significant repellency. In case of oviposition deterrent activity test, the highest oviposition deterrence of 61.15% was observed in treated sweet guard with the extract of P. hydropiper while the lowest oviposition deterrence of 22.28% was found in treated sweet guard with the extract of A. indica.