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

Abstract

The  two  i nsecticides  Nogos and  Sumicidin  were  tested  for  their activity  against larvae  and  eggs  of  Culex  pipiens under  laboratory conditi on.

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  mortal ities (94%) after

24  brs and (98%) aft.er 72 hrs at 1 .0  ppm while with Sumicidin, the larval  mm1a lities  were  (53%)  and  (78%)  after  24  hrs and  72  hrs respectively  at  the  same  concentrati on.  The  exposure  of  deposited eggs of C. pipiens lO 0.0005-  1.0 ppm of both insecticides revealed no noticeable   ovicidal  effects   with   Sumicidin,  but  with  Nogos   the (% hatching) was 65.66 atl.O ppm.