... infected by PfDNV directly;3)PfDNV spread in the whole cockroach group horizontally and infectedvia eggs to next genaration vertically4) ... Man-made virus pestilence,kill the whole cockroach group effectively3.Bio-killer Advantage:1)Non-toxic,non-pollution ... home,hotel,plane,super market,school ect or for Pest control service5.Packing specification:10g,12g,20g,50g 6.Packing ...