pest are that it lies in the daytime and comes out at night, with suspended animation and a waxy layer on its epidermis. Therefore, this pest has strong drug resistance, and it is difficult to control < P >. Using common pesticides to control Spodoptera exigua, the effect is often unsatisfactory, which seriously affects crop yield and quality, and brings great losses to agricultural production, especially vegetable production, and can lead to crop failure when it occurs in large quantities.
The research shows that 1% chlorfenapyr, .5% methylamino abamectin benzoate, 2% chlorfenapyr suspension, 1.8% abamectin EC, 4% profenofos EC and 5% cypermethrin EC are suitable for controlling Spodoptera exigua, among which
1% chlorfenapyr suspension and .5% chlorfenapyr suspension are used. Followed by 2% tebufenozide suspension concentrate and 1.8% avermectin EC, the control efficacy was above 71% after 3 days. The control effect of 4% profenofos EC and 5% cis-cypermethrin EC diluted 1
is about 5%, and insecticides such as chlorfenapyr and emamectin benzoate should be selected when the insect population is dense or old.
In order to avoid the resistance of Spodoptera exigua, and remind farmers not to use these highly effective pesticides continuously and singly,
we should use them alternately, especially those with different action mechanisms, and at the same time, we should strengthen the research and application of comprehensive control technologies such as agricultural control and biological control.