The insecticides contain Propoxur, {TAIL ~ Pyretrines}, silicates and {HEAD ~ a combustible wax} 
The insecticides contain Propoxur , { TAIL ~ Pyretrines } , silicates and { HEAD ~ a combustible wax }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD