N. Bakthavatsalam
Principal Scientist & Head
Division of Insect Systematics
ICAR-National Bureau of Agricultural Insect Resources
India
Biography
The different geographical populations of Helicoverpa armigera utilized different blends of Z-11-hexadecenal and Z9- hexadecenal, proved through electro antennogram and behavioural experiments Synergistic activity was observed when odorant mixtures were presented to the insects in comparison to individual as the insects perceive the blends as different compounds though it is not possible to identify new compounds in the mixtures through analytical methods. Developed attractants for chrysopids and trichogrammatids which can be used as reinforcing agent in the fields Cultivars such as MCU-5 or MCU- 9 were highly preferred by entomophages because of their favorable chemical and physical characteristics. Conservation of natural enemies through tritrophic interactions and use of semiochemicals was proved.
Research Interest
Present interests are the conservation of entomophages through habitat manipulation techniques, Isolation, identification and utilization of attractant chemicals for increasing the efficiency of the entomophages. Development of chemical mimics for increasing the efficiency of the attractants
Publications
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Bakthavatsalam, N. and Tandon, P. L. 2006. Kairomones, their optimum concentrations, and application techniques to enhance the parasitization efficiency of Trichogramma chilonis Ishii (Hymenoptera: Trichogrammatidae) Journal of Biological Control. 20(2):169-174.
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Trichogramma chilonis Journal of Biological Control 20(1): 13-18 Bakthavatsalam, N., Tandon, P.L. and Ballal, C. R. 2007. Behavioral responses of Campoletis chlorideae (Ichneumonidae : Hymenoptera) to the kairomonal substances. Journal of Entomological Research, 31(3):217-223
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Bakthavatsalam, N. and Tandon, P.L. 2006. Influence of strain variation and kairomonal compounds on the parasitising efficiency of Trichogramma chilonis Journal of Biological Control 20(1): 13-18
