it>Blattella germanica (L.) populations in low-income homes Were effectively controlled with residual applications of Chlorpyrifos dust or water emulsion spray, and boric acid powder. Mean population reductions at 0.5, 1, and 6 months were: 1% chlorpyrifos dust, 90, 96, 99%; 1% chlorpyrifos dust + 0.5% chlorpyrifos spray, 99, 99, and 97%; 0.5% chlorpyrifos spray, 95, 99, and 100%; and boric acid
... [Show full abstract] powder, 95, 97, and 98%, respectively. Pretreatment counts of cockroaches by type of room gave means of: kitchen 467, dining room, 241, hall 47, living room 45, bedroom 37, bath 21, and miscellaneous rooms 0.
