title: Use of chlorpyrifos for the control of Ixodes ricinus on pasture.
mesh_terms: D000818:Animals; D004390:Chlorpyrifos; D006109:Poaceae; D012756:Sheep / Q000469:parasitology*; D013983:Tick Control / Q000379:methods*; D013987:Ticks
chemical_list: D004390:Chlorpyrifos