Jordan Journal of Agricultural Sciences 4(1): 1-11, 2008

Effects of direct spray and residual exposure of different insecticides on the cereal leafminer Syringopais temperatella Led. (Lep., Scythrididae) under laboratory conditions

Abstract: The cereal leaf miner, Syringopais temperatella Led. (Lep., Scythrididae) is a destructive pest on wheat in Karak District, Jordan. However, no research has been undertaken on the efficacy of insecticides for the control of this pest. Therefore, mortality of S. temperatella from direct spray and residual exposure was compared for eight insecticides under laboratory conditions. The obtained results indicated that S. temperatella mortality was significantly affected by insecticide, concentration and time after application. The mortality of S. temperatella larvae exposed to low and medium concentrations of insecticides in direct spray indicated that chlorpyrifos, imidacloprid and fenitrothion had the highest mortality. While at high concentration, in addition to these three insecticides, diazinon gave 100% mortality. Generally, the overall effect of insecticides in direct spray indicated that chlorpyrifos caused the highest mortality. On the other hand, the results of residual exposure indicated that after one and three days, diazinon and chlorpyrifos caused significantly high mortality, while after five days, cypermethrin and methomyl mortalities were significantly the highest. In conclusion, the insecticides tested in this study have the potential to control the pest.