The Insccticidal Effects of Nogos and Sumicidin Against Eggs and Larvae of The Mosquito Culex pipiens L. (Diptera: Culicidae)

The two insecticides Nogos and Sumicidin were tested for their activity against larvae and eggs of Culex pipiens under laboratory condition. Third instar larvae were exposed for 24, 48 and 72. hrs to five concentrations each insecticide test: 0.0005, 0.005, 0.05, 0.5 and 1.0 ppm. The same concentrations were used to test the eggs hatching. The results showed that Nogos was more effective than Sumicidin. This insecticide (Nogos) demonstrated larval mortalities (94%) after 24 hrs and (98%) after 72 hrs at 1.0 ppm while with Sumicidin, the larval mortalities were (53%) and (78%) after 24 hrs and 72 hrs respectively at the same concentration. The exposure of deposited eggs of C pipiens to 0.0005- 1.0 ppm of both insecticides revealed no noticeable ovicidal effects with Sumicidin, but with Nogos the (% hatching) was 65.66 atl .0 ppm.