Abstract

Plant and insect shares strong mutual relationship in terms of pollination and nesting place. This study documented insect - plants relationship and diversities within Delta State University (DELSU) Campus, Abraka. Sampling for insect and their associated plant species were carried out within in two campus (Site II and II) of DELSU, Abraka. Sweep nets were used for the collection of insect and leaves of plant species were collected for identification. A total of 609 insects from 4 orders, 13 families, and 14 species were collected from the two sites. The insect Orders and distribution of different families encountered were Coleoptera (30.76%), Diptera (15.38%), Hymenoptera (30.76%) and Orthoptera (23.10%). Variation in the results using Duncan Multiple Range Test (DMRT) showed significant difference in species abundance and composition across the study Sites. Species diversity indices of 0.1043, 0.8957, 2.404, 0.8511, 2.203 and 0.9371 were recorded in Site II while diversity indices of 0.0868, 0.9132, 2.585, 0.8291, 2.529 and 0.9324 were recorded in Site III for Dominance_D, Simpson_1-D, Shannon_H, Evenness_e^H/S, Margalef and Equitability_J. 17 plant species in 15 families mostly dominated by Asteraceae and Rubiaceae were encountered as nesting and resting places for insect across the two campus. This study therefore suggest that species conservation and planned expansion should be carried out to reduce the ecological damage of plant diversity as insects make use of the plant species for nesting (habitat), obtaining food and resting.