none Hexamermis; Celatoria bosqi; Centistes gasseni; COLEOPTERAN-HOSTS; Diabrotica speciosa; Seasonal prevalence; CULTIVATED-LAND-HABITAT; BRAZIL-; Rio Grande do Sul, Pelotas; Seasonal prevalence in coleopteran host, vegetable crops Diabrotica speciosa; NEMATODE-PARASITES; Hexamermis; INSECT-PARASITES; DIPTERAN-PARASITES; Celatoria bosqi; HYMENOPTERAN-PARASITES; Centistes gasseni; FUNGAL-DISEASES; Beaveria bassiana & Metarhizium anisopliae; Seasonal prevalence; CULTIVATED-LAND-HABITAT; BRAZIL-; Rio Grande do Sul, Pelotas; Natural enemies survey, vegetable crops A survey of natural enemies of Diabrotica speciosa (Germ.) adults collected on different vegetable crops in Pelotas, RS (lat. 31 degree ,52'S, long. 52 degree , 21'W) was conducted. The most frequent natural enemies were the tachinid Celatoria bosqi Blanch., the braconid Centistes gasseni Shaw and the fungus Beauveria bassiana (Bals.) Vuill. The nematode Hexamermis sp. and the fungus Metarhizium anisopliae (Metsch.) Sorok. occurred at low levels. The lowest percentage of parasitism was observed in December (6.6%) and the highest in April (35.5%), with an yearly average of ca. 20%.