During Kharif 2018, a field experiment was conducted at College of Agriculture, V. C. Farm, Mandya to study the bio-efficacy of certain insecticides against mirid bug, P. biseratense and the economical feasibility was also studied. The studies showed that among nine insecticide molecules tested for their bio-efficacy against mirid bug, the seed treatment along with foliar sprays of imidacloprid 60 FS and thiamethoxam 25
Experiments were conducted to study the life history traits of Spodoptera litura under controlled environmental conditions on groundnut host. To construct the age-specific fecundity life tables, adults emerged on the same day were caged for oviposition and the number of eggs laid on each day was recorded. The key mortality factors involved in each life stages were also accounted. Females contributed highest number of progeny (mx = 346.12) on 39th day of pivotal age. The net reproductive potential (Ro) was 858.52 females/female/generation with the mean generation period (Tc) of 38.86 days. The life table analysis revealed that the late instar larvae were more vulnerable to natural mortality factors (64.95%) and total mortality per cent recorded was 83.02. The various key mortality factors viz., parasitoids (Cotesia sp., Chelonus sp. and Tachinids), virus (NPV), malformed pupa and adults were recorded from the field population of S. litura from groundnut ecosystem.
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