[The infective capacity of the nematode Romanomermis culicivorax Ross et Smith, 1976 (Rhabditida: Mermithidae) in mosquito larvae of the species Anopheles albimanus Wiedemann, 1821 (Diptera: Culicidae) under natural conditions].

An experimental study was carried out in two natural breeding sites of Anopheles albimanus Wiedemann, 1821 in Havana City, in order to test the effectiveness of the nematode Romanomermis culicivorax Ross and Smith, 1976. In one of the breeding sites fresh preparasiticals from eggs recently hatched in cultures were applied at a 10:1 dose, a mean infestation rate being found of mean = 3 with a 97 +/- 0.86% mortality. The second breeding site was treated with preparasiticals 30 hours after their obtention, and a decrease was seen in the larva infestation levels mean means = 1.1 and 76 +/- 0.76% mortality rate.