Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.1999.617.618Balaninus nucum (Coleoptera; Curculionidae) and Euproctis chrysorrhoea (Lepidoptera; Lymantriidae)]]>YamanMustafa Kazim Sezen Zihni Demirbag 3199923In the present study, in order to find a more effective and safe biological control agent against common pests of Coryllus sp, Balaninus nucum (Hazelnut beetle, Coleoptera) and Euproctis chrysorrhoea (Browntail moth, Lepidoptera), we tested the insecticidal effects of various biological agents. The highest insecticidal effects that we determined for each pest within 10 days are 90 percent using Lymantria dispar nuclear polyhidrosis virus (LdNPV, as gypchek) and toxin (BTS-1) isolated from tenebrionis strains of B. thuringiensis against B. nucum and 73.6 percent using LdNPV and 57.8 percent using toxin (HD-1) isolated from Harry Dumagae strain of B. thuringiensis against E. chrysorrhoea. We think that the insecticidal effects of all agents are the results of cytotoxicity.]]>Ben-Dov, E., S. Boussiba and A. Zaritsky,1995Escherichia coli with combinations of genes from Bacillus thuringiensis subsp. israelensis.]]>17728512857Deacon, J.W.,1983Demirbag, Z. and M. Yaman,1999Euproctis chrysorrhoea L. (Lepidoptera: Lymantriidae).]]>1999Dulmage, H.T.,1981Bacillus thuringiensis and their Potential for Pest Control.]]>1981pp: 193-222pp: 193-222Esters, M.,19961996Lipa, J.J. and E. Wiland,1972Agrotis sp.]]>4127140Martens, J.W.M., G. Honee, G. Zuidema, J.W.M. van Lents, B. Visser and J.M. Vlak,1990627642770Martin, H.,1949Balaninus nucum L.).]]>28328Moar, W.J., M. Pusztzai-Carey and T.P. Mack,1995Bacillus thuringiensis against Lesser Cornstalk Borer (Lepidoptera: Pyralidae).]]>88606609Sezen, K. and Z. Demirbag,1999Balaninus nucurn L.).]]>348589Thiery, I. and E. Frachon, 19971997Ural, I., M. Isk and A. Kurt,19731973