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Diversity of parasitoids and predators in the sole cropped and intercropped, border cropped, and hedgerow cropped fields of guava (sole cropped and intercropped with cowpea), mulberry (sole cropped and border cropped with castor), and sapota (sole cropped and intercropped with clusterbean) were documented in two villages Naukalpalya and P Rampura of Kanakapura district in Karnataka, India, during 2016–2017. The parasitoids and predators were collected using yellow pan traps and sweep nets. The variations in the diversity, species richness, and evenness between two cropping systems are discussed in this paper. Diversity indices were worked out. Predators belonging to the families viz., Coccinellidae, Carabidae, Chrysopidae, Syrphidae, and Pentatomidae were recorded. The adult parasitoids belonging to the families Trichogrammatidae, Braconidae, Encyrtidae, and Ichneumonidae were recorded. Shannon-Weiner index, Margalef’s richness index, and evenness index found to be higher in the inter/border/hedgerow cropped fields compared to the sole cropped ecosystems. The abundance of the adult stage of the predators and parasitoids of the inter/border/hedgerow crops was found to be higher. The results of the study confirmed the role of crop diversification as a tool to enhance the functional biodiversity of parasitoids and predators for an efficient biological control program.

Effect of intercrops and border crops on the diversity of parasitoids and predators in agroecosystem