Insects that spend part of their lives in the soil, such as Diaprepes abbreviatus, Pachnaeus spp., Compsus spp., Artipus floridanus present a challenge as biological control targets. The life stages that are observed on leaves (i.e., eggs and adults), are considered more exposed to the action of parasitoids than those found in the soil (i.e., larvae and pupae). At the same time, more parasitoids ( Trichogrammatidae, Eulophidae, Mymaridae, Platygastridae) have been collected from weevil eggs (Brachyufens osborni, Ceratogramma etiennei, Quadrastichus haitiensis, Aprostocetus vaquitarum,, Haeckeliania spp., Haeckeliania n. sp., Cleruchus sp., Fidiobia citri, Fidiobia n. sp.,) than those (Microctonus sp , Trigonospila n. sp) reported from adult weevils . These results however, are influenced by different factors (i.e., intensity of exploratory surveys, lack of knowledge of weevil behavior, host plants, parasitoid taxonomy and biogeography of parasitoids ). A case example of constraints and success of the classical biological control of D. abbreviatus in Florida is discussed.