Resurgent pests or invasive exotic pests (e.g., two new species of mealybugs, or the Trioza erytreae, transmitter of the Huanglongbing disease (HLB)) are major challenges of the Mediterranean citriculture). The solution could be to increase the presence and prevalence of natural enemies of pests through the introduction of plant biodiversity such as perimeter hedges, ground covers and flower strips.