Abstract: Abstract:The toxicity of common insecticides used in fields and orchards to different larva of instars and adults of ladybird (coccinella seotempanctala) was tested in the laboratory. The results showed the orders of toxicity of the insecticides to larva of different instars and adults Respectively were deltamethrin >acetamiprid >methomyl > abamectin>imidacloprid>phoxim>omethoate>fenvalerate (the second instars); acetamiprid>phoxim> methomyl> imidacloprid>abamectin>omethoate>fenvalerate(the third instars); eltamethrin>cetamiprid>abamectin> methomy >fenvalerate>phoxim (the forth instars); malathion>omethoate> malathion>omethoate>methomyl>deltamethrin> abamectin>cyfluthrin>acetamiprid>imidacloprid>phoxim>fenvalerate (adult). The toxicity of different insecticides to adults and larva of different instars was different, which indicated different stages and instars had different susceptibility to those common insecticides. The study was to provide basis of reasonably using insecticides for protecting enemies in fields and orchards.