000			02337nam a2200217Ia 4500
003			OSt
005			20220711121600.0
008			130502s9999 xx 000 0 und d
040			_cCPGS
082			_a635.349789
100			_aDebbarma, Meena _9729
245			_aEcological aspects related to biological control of cabbage butterfly, Pieris brassicae(L.)(Lepidoptera:pieridae) in Meghalaya / _cMeena Debbarma
260			_aUmiam : _bCPGS, CAU, _c2012
300			_a[24], 58p.: _bill., some col.;
440			_a[Entomology ,School of Crop Protection] _91309
520			_aAbstract: Present investigation was carried out in the year 2011-12 to study natural parasitism dynamics, competitive interaction between parasitoids and behavioral response of Pieris brassicae (L.) and its parasitoids under the influence of both plant and herbivore volatiles. Parasitism by Hyposoter ebeninus (Grav.) was noticed from early October, 2011 and it was found to be highest (67.00%) during second week of January, 2012; whereas it was lowest (2.00%) in the fourth week of March and completely disappeared by early April, 2012. Seasonal variation in the development of two parasitoids showed inverse relationship between temperature and developmental time. No correlation was observed between percent females in the progeny of H. ebeninus (Grav.) and weather parameters. Competitive interaction between H. ebeninus and Cotesia glomerata revealed significantly higher total parasitism when both parasitoids were released together for 24 hours. Furthermore, precocious mortality was observed to be maximum (24.00%) in the treatment 'C. glomerata (L.) followed by H. ebeninus'. Egg-larval period was also highest in the same treatment. However, per cent pupation was highest in the treatment, H. ebeninus alone and C. glomerata alone. Behavioral response of both the natural enemies on plant and herbivore volatiles indicated that mechanically damaged plant + larvae + larval excreta of P. brassicae was found most attractive to the parasitoids which was followed by mechanically damaged plant + larval excreta. In contrast, P. brassicae visits were higher on healthy or undamaged plant.
650			_aCabbage butterfly _xBiological control _9730
650			_aPieris brassicae _9731
700			_aFirake , D. M. _eMajor Advisor _9732
942			_2ddc _cTH
999			_c4026 _d4026