... such as appliances, precision instruments, etc.) of the large area killing cockroach.Application process1, Each point of use level usually mung size, spacing ... .2, 7-15 days for point, for the first time with the dose of 1/3 to 1/5, to kill freshly ... can attract roaches to get near and feed on Biokiller. What are the difference between chemical ones and biological ones(Biokiller)?Chemical ones ...