The present work was carried out to determine quality, quantity of lost spraying on ground and the biological efficiency produced by three ground equipment, knapsack motor sprayer (20L/fed) compression hand held sprayer (94L/fed), and conventional ground motor sprayer (600L/fed). Pyriproxyfen formulation was used for controlling S. littoralis (Bosid) on cotton fields with recommended dose and 3/4 recommended dose during season 2006. Date showed that the disappearance of pyriproxyfen residue from soil takes place at the 15^th day for Agromondo and Kwazar sprayer treatments, while at the 21^st day for wisconson conventional sprayer treatments. The amount of pyriproxyfen residue in soil sprayed with 3/4 recommended dose rate was less than that sprayed with full recommended dose rate for the three sprayers. Agromondo sprayer revealed the least amount of pyriproxyfen residues in soil followed by kwazar sprayer and wisconson motor sprayer revealed the largest amount of residues. Also data showed that there was no significant difference between 3/4 recommended dose rate and full recommended dose rate with pyriproxyfen in case of agromondo motor sprayer and hand held sprayer in bioefficacy.