Evaluation of different insecticides against external parasites of hens | Evaluación de distintos insecticidas frente a ectoparásitos de la gallina doméstica

Spanish; Castilian. La fauna aracnoentomológica de las aves desarrolla resistencia a los insecticidas, por lo que es necesario utilizar nuevos productos. El objetivo de este experimento fue evaluar nuevos insecticidas, comparándolos con otros conocidos frente a Megninia ginglymura. Se utilizaron setenta gallinas White Leghorn de una unidad con antecedentes de incidencia de este ácaro. Se muestrearon previamente, se identificaron con bandas y se formaron seis grupos de once gallinas cada uno, distribuidas según el muestreo previo. Los tratamientos fueron: Alfacipermetrina,10 ml/litros; Malatión,20 ml/litro; Cipermetrina 12 ml/litro; Neguvon,1.5 g/litro; Cipermetrina A,12 ml/ litro y Asuntol 1 ml /litro. El control de cada tratamiento fue su diagnóstico previo. Se aplicaron los tratamientos y se muestreó nuevamente a los 15 días. Para la interpretación de los resultados se aplicó la dócima de Duncan (1955). A los 15 días después del primer tratamiento se observaron diferencias significativas a favor de Cipermetrina, Cipermetrina A y Malatión (83,8; 70,9 y 77,4%) respectivamente, lo cual se repitió a los 15 días después del segundo tratamiento (96,7%) para los tres tratamientos mencionados. Neguvón y Asuntol no fueron efectivos y Alfacipermetrina tuvo efectividad media (67,7%). La aplicación de un segundo tratamiento a los 15 días del primero contribuyó a obtener una efectividad mayor.

English. The fauna of acarus and insects of poultry is developing resistence against insecticides, by this reason it is necesary to use new products. The purpose of this experimental work was to evaluate new insecticides in comparison with other ones which are know by their efficacy against Megninia ginglymura. Seventy White Leghorn hens were available which belong to a poultry farm having this external parasite previously. First the birds were researched and identified with bands in order to get 6 groups of 11 hens each one dealed out according to previous results. The treatments were the following: Alphacipermetrine,10 ml/liter; Malathion,10 ml l/ liter; Cipermetrine, 12 ml l/liter; Neguvon, 5g/liter; Cipermetrine, 2m1/liter; Asuntol , 1ml/liter. The control of this treatment was this previous diagnostic. The treatments were supplied and 15 days later a monitory of the birds was carried out. A second treatment was given and again a new monitory was done 15 days later. The results were analyzed as a comparison of proportions and Duncan. At 15 days after the first treatment the results were significant higher with Cipermetrine, Cipermetrine A and Malathion (83.8; 70.9 and 77.4 %, respectively) but 15 days after the second treatment, the above three ones were promoted up to 96.7 % as it has been reported by other authors. Neguvon and Asuntol were effectiveness. The second treatment helped to obtain a higher efectiveness.