Assessment of different methods of natural enemy collection in three different locations of Vijayapur district of Karnataka

Abstract

We undertook comparative analysis of natural enemies in grape ecosystem in Vijayapur District of Karnataka during rabi season of 2016-17(October-April). Studies included three locations namely Vijayapur (Study area-1), Aliyabad (Study area-2) and Tikota (Study area-3) where in common agronomic practices were maintained but different plant protection measures for major insect pests. Natural enemies were collected through different methods Viz., Herbivore induced plant volatile (HIPV), Yellow sticky trap (YST) and Sweep net (SN). A total of 1312.90 natural enemies were recorded from HIPV followed by a Yellow sticky trap (1078.38) and sweep net (674.44). The abundance was highest in HIPV (43.00 %) followed by a yellow sticky trap (35.00 %) and lowest in sweep net (22.00 %). HIPV method of collection was found significantly superior and on par with yellow sticky trap method in the collection of natural enemies belonging to families Coccinellidae, Syrphidae, Ichneumonidae, Pentatomidae and Miridae, Chrysopidae and Hemerobidae.