Method of combatting blowfly larvae

摘要

Ectoparasiticidal compositions and uses employing 0,0-dialkyl- 0- pyridazine phosphoric and thionophosphoric acid esters are described. A typical embodiment is a composition for combatting blowflies containing diethyl-0- 1-phenyl-6-oxopyridazin-3-yl!phosphoric acid ester.