Agricultural Sciences: Techniques and Innovations Vol. 12

Brinjal, or eggplant, supports a persistent insect-pest complex in which internal feeders, sap feeders, mites and defoliators impose different ecological and operational demands on pest management. The fruit and shoot borer is usually the principal yield-limiting species in South Asian production, but whiteflies, leafhoppers, aphids, thrips, mites and leaf-feeding beetles can become locally dominant, particularly when insecticide use disrupts natural regulation. This critical narrative review evaluates how natural enemies and plant diversification can be combined to build more durable pest management rather than applied as isolated components. Literature was selected through transparent searches of accessible scholarly indexes and verified journal records, with emphasis on field evidence, mechanistic relevance, methodological quality and consistency across production systems. The evidence indicates that plant diversification can reduce pest colonisation, alter host-finding, provide food and refuge for beneficial arthropods, and improve yield stability; nevertheless, outcomes depend strongly on companion identity, spatial arrangement, crop ratio, phenology and landscape context. Natural enemies contribute most reliably when interventions are matched to pest biology: parasitoids and egg-stage tactics must act before fruit and shoot borer larvae enter plant tissue, whereas predator-parasitoid assemblages can exert stronger continuous pressure on exposed sucking pests. Higher natural-enemy abundance does not automatically produce lower pest density or damage, and broad-spectrum insecticides, intraguild interactions, alternative prey, poor synchrony and inadequate habitat resources can weaken expected benefits. The strongest strategy is therefore an adaptive architecture that couples sanitation, monitoring and selective interventions with purpose-designed intercrops, flowering resources, semi-natural habitat and compatible biological products. Current evidence is limited by short experimental durations, small plots, inconsistent outcome reporting and geographical concentration. Future research should use factorial, multi-season and landscape-aware trials that measure pest suppression, natural-enemy function, yield, profitability, pesticide displacement and farmer feasibility together.