الفهرس 
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Abstract
1. The cotton leaf worm, Spodopetra littoralis (Noctuide: Lepidoptera) is considered as one of the most important cotton insect pests in Egypt and many other countries of the world, this insect pest infests over 112 plant species belonging to 44 families . The larval stage of S.littoralis is known as a notoriously leaf eater accepting almost all herbaceous plants (Hill, 1975).
Insecticides have been widely used in agriculture to fight against insects, for many years. Insecticide use was meant to increase crop productivity. A wide range of insecticides, including organophosphorus, carbamates, pyrethroids and new groups of insecticides, have been used on many crops to control insect pests and cotton leaf worm which its control was depending mostly on use of insecticides.
An important consideration in the choice of insecticides for crop protection is the length of time for which the toxic residues will persist on foliage or reproductive tissue, as well as on soils. Persistent insecticides might be preferable to use against a continuous, heavy infestation of pests, while insecticides of short persistence might be preferable for the control of sporadic infestations to allow the survival or rapid reestablishment of natural enemies (Raha et al. 1993).
Raslan et al. (2009) stated that emamectin benzoate kill 93.7% of S.littoralis while methomyl insecticide was very to