Browsing by Author "Kesavan Subaharan"
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Item Chemoecological Methods in Coconut Pest Management(2018) Kesavan SubaharanItem Controlled delivery of essential oils for the management of rhinoceros beetle (Oryctes rhinoceros L. ) in coconut(2019) Ravindran, P; Kesavan Subaharan; Chandran, K.P.; Vibina, V.; Subrahmaniyan, T.M.; Sonu, K.P.Item Effect of sub lethal dose of insecticides on electrophysiological and behavioral response of Bracon brevicornis Wesmael (Braconidae : Hymenoptera) a parasitoid of coconut black headed caterpillar, Opisina arenosella Walker (Oecophoridae : Lepidoptera)(2012) Kesavan Subaharan; Charles Sahayaraj; Prasad, A.R.; Ravikumar, N.Bracon brevicornis Wesmael (Braconidae : Hymenoptera) is an effective parasitoid against coconut black headed caterpillar, Opisina arenosella Walker (Oecophoridae : Lepidoptera) a major pest on coconut. During outbreaks, chemical insecticides and bioagents are used in tandem to manage O. arenosella. Traditionally the impact of pesticides on beneficial arthropods was assessed by determining acute toxicity. In addition to direct mortality caused by insecticides, the sublethal effect on sensory physiology and behavior of parasitoids must be considered for complete analysis of their impact. The present study aims to investigate the impact of sub lethal dose of insecticides on B. brevicornis. In olfactory assay, the starved parasitoids oriented to food source, whilst the fed parasitoids responded more to host volatiles. In electrophysiological assay, the antennal responses of B. brevicomis to host volatiles were higher in female. Among the volatiles tested, the host frass and host haemolymph was most preferred by both sexes. Exposure of B. brevicornis to sublethal dose of imidacloprid, malathion and carbaryl (LD20) altered the orientation of B. brevicornis to host volatiles.Item Electrophysiological and behavioral response of red palm weevil, Rhynchophorus ferrugineus (Olivier) (Coleoptera: Dryophthoridae) to fermented coconut sap neera(2019) Vibina Venugopal; Kesavan SubaharanItem Impact of entomopathogenic nematodes on rhinoceros beetle larvae, Oryctes rhinoceros (Coleoptera: Scarabaeidae)(2012-11) Jagadeesh Patil; Rajkumar; Kesavan SubaharanItem Influence of abiotic factors on behaviour and adult emergence pattern of coconut white grub, Leucopholis coneophora Burmeister (Coleoptera: Scarabaeidae)(2018) Prathibha, P.S.; Kumar, A.R.V.; Kesavan Subaharan; Vibina VenugopalItem Olfactory response of red palm weevil, Rhynchophorous ferrugineus (Olivier) (Coleoptera: Dryophthoridae), to host / food volatiles(2019) Vibina Venugopal; Kesavan SubaharanItem Semiochemicals in management of coconut rhinoceros beetle and red palm weevil(2013-07) Kesavan Subaharan; Vibina Venugopal; Raveendran, P.Item Visit to attend the Entomology 2011 organized by entomological Society of America.(2011) Kesavan Subaharan