Parasitismo de Steinernema rarum (OLI) (Nematoda: Steinernematidae) de la provincia de Córdoba en adultos de Periplaneta americana (Insecta: Blattodea)?

AGUIRRE VARELA, AILÍN D. A. ; BERTOLOTTI, M.A.; CAGNOLO, S.R.

La Falda

Jornada; XXI Jornadas Científicas Sociedad de Biología de Córdoba; 2017

Sociedad de Biología de Córdoba

Entomopathogenic nematodes are lethal organisms for their hosts, therefore they are an alternative for the biologica management of harmful insects. Periplaneta americana, the American cockroach, is an urban pest of medical, veterinary and economic interest. In the current research it was evaluated the efficiency of Steinernema rarum (OLI) inadults of P. americana in laboratory. Individual infections (n = 38) were carried out in Petri dishes using two doses (D): 3200 and 6400 infective juveniles (JIs) of the nematode/host and one control group. Infections were maintained at 25 ± 1 ° C. Insects mortality was recorded every 24 hours for 10 days. The results obtained were: 66.9% and 84.8%, with the low and high doses, respectively. Emergence of Jls was observed in 100% of the dead insects with D 3200, and in 88.2%, with D 6400. It is concluded that the adults of P. americana are susceptible to S. rarum (OLI) and that the nematode can complete its life cycle in this insect. It is the first time that parasitism of a native isolate of the Family Steinernematidae in P. americanais evaluated in Córdoba. It is expanded the host range of S. rarum (OLI), the most virulent isolate among those known to date for the province.