Browsing by Author "Mohandas, N."

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    Biology of coconut white grub Leucopholis coneophora Burm.(Melolonthinae: Scarabaeidae: Coleoptera)
    (2007-02-08) Abraham, V.A.; Mohandas, N.
    Biology of the coconut white grub Leucopholis coneophora Burnt, was studied in detail in field cages. Egg period 23 days. The mean larval durations were 260 and 270 days and pupal durations 25.3 and 25.7 days, for males and females, respectively. Sexes of beetles could be differentiated by size of antennal club. Adults emerged from soil at dusk for mating and returned to the soil in 23-25 minutes. Adults did not congregate on plants as done by many melolonthids and were not found feeding on vegetation.
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    Effect of different food plants on growth and development of the coconut white grub Leucopholis coneophora Burm
    (2007-02-08) Abraham, V.A.; Mohandas, N.
    Effect of different food plants on the development and biotic potential of the coconut white grab, Leucopholis coneophora was studied in specially designed field cages. Three-day-old first instar grubs were Individually reared upto adult stage on coconut seedlings, cassava, cacao and wild sunn-hemp. Duration of different stages of L. coneophora, size and body weight, percentage survival, fecundity and vlability of eggs were recorded. The duration of devetopioeat was least In cassava and coconut followed by those in cacao and wild sunn-hemp. The observations indicated that cassava and coconut were more,: favourable hosts of L. coneophora. A higher build up of pest population is, hence, likely In coconut ' gardens In which cassava is grown as an intercrop.
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    Population Abundance of Leucopholis Coneophora Burm. in Coconut Gardens
    (2007-02) Abraham, V.A.; Mohandas, N.
    Population of different life stages of white grubs Leucophotis eoneophora Burnt., an important pest of the coconut palm at different depths of the soil and their seasonal intensity were studied for a period of three years. The beetle population and eggs were more at depths of 30 to 100 cm, first, second and third instars at IS to 45 cm and pupal stages at 60 to 100 cm depth. The information gathered is of great significance in planning management schedules against white grubs.