The present study was designed and compares the efficacy of three
Pesticides against the buffaloes lice (Haematopinus tuberculatus) infesting buffalo in the farmer
houses in Sohag Governorate .The pesticides which treated were Malathion 57%, Diazinon15% and
Diazinon 60% EC at concentration of ml/ liter water against lice. The pesticides were spray on all
treatment and the animal examined was after 24 hrs till 45 days. The decrease or increase of the
population at buffalo lice was estimated and comparison between the three pesticide. Diazinon 60%
showed variable toxicity to animal parasites. According to the percentage of mortality recorded
after24 hrs till 45 days followed by Malathion 57% with the same concentrations. The late efficiency
was Diazinon 15%.This may be due to the low of the active ingredient in Diazinon 15% compared
with Diazinon 60%.In general we can use Diazinon 60% with 1cm/liter water as spray on the animal
body to control the buffalo lice.