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Revista Cubana de Medicina Tropical

Print version ISSN 0375-0760On-line version ISSN 1561-3054

Abstract

MONTADA, DOMINGO  and  GUERRERO, JOSE A. Efectos de 3 formulaciones de insecticidas en el desprendimiento y eclosión de las ootecas de Blattella germanica (Dictyoptera: Blattellidae). Rev Cubana Med Trop [online]. 1996, vol.48, n.2, pp.83-86. ISSN 0375-0760.

Different insecticide formulations used for the control of German Cockroach, Blatella germanica (L.) were studied to know their effects on the gravid females of this species. The insecticides assayed were baygon 20 % EC, diazinon 60 EC, and licon 2,5 % EC. Exposure to each insecticide showed an effect on the oothecal drop (p < 0,001). Gravid females treated with baygon had the highest percent of oothecae detached (71 %); whereas diazinon caused the lowest percent (33,5 %). Doses of baygon, diazinon, and icon used showed that among the oothecas detached hatching ocurred only in 19,01 %;34,2 % and 39,11 %, respectively. Of the oothecas retained by treated females, the lowest hatching percent was produced by baygon (13,79 %) compared with diazinon and icon insecticides, which presented the highest hatching percents with 39,84 and 47,82, respectively. Therefore, the effects on insecticides on females bearing oothecas may be considered at the time of selecting an insecticide to control the German cockroach.

Keywords : INSECT CONTROL; INSECTICIDES; COCKROACHES.

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