Effectiveness of certain insecticides against the tomato leaf miner Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)

Eight insecticides used in the present study were chloropyriphose, methomyl, lambada cyhalothrine, imidacolpyrid, abamectin, chlorfenapyr, chlorantraniliprole, and emamectin benzoate representing different insecticides with different modes of action were chosen to evaluate their toxicity against the tomato leaf miner, T. absoluta under laboratory and field condiations. Data clearly indicate that the order of efficiency of the tested insecticides was the same at both LC50 and LC90 levels. The tested insecticides could be descendingly arranged as follows: abamectin, chlorfenapyr, chlorantraniliprole, methomyl, emamectin benzoate, chlorpyrifos, lambada cyhalothrin, and imidacloprid. Also, the field results took the same trend of laboratory ones. The results indicated that all the tested insecticides had significantly affected the insect population and the average percentages reduction of infestation with T. absoluta in tomato field. The average percentages reduction of infestation had affected by tested insecticides and part of plant (leaves & fruits). It is recommended by using abamectin, chlorfenapyr, and chlorantraniliprole in controlling this insect according to their potency.

Keywords:

Tuta absoluta , Tomato , Chloropyriphose , Methomyl , Lambada cyhalothrine , Imidacolpyrid , Abamectin , Chlorfenapyr , Chlorantraniliprole , Emamectin benzoate