. Cockroaches : how to control them. Cockroaches. DEVELOPMENT German and brown-banded cockroaches mature in 2 to 5 months; other kinds mature in about a year. Cockroaches grow slowly when food, temperature, and moisture are unfavorable. Conditions are not usually ideal for rapid growth in buildings and homes where good sanitation is practiced. The female lays her eggs in a leathery capsule, which she forms at the end of her body. The Ger- man cockroach carries the egg capsule about a month, and drops it just before the eggs hatch; about 36 cockroaches hatch from the capsule. The other kinds ca
. Cockroaches : how to control them. Cockroaches. DEVELOPMENT German and brown-banded cockroaches mature in 2 to 5 months; other kinds mature in about a year. Cockroaches grow slowly when food, temperature, and moisture are unfavorable. Conditions are not usually ideal for rapid growth in buildings and homes where good sanitation is practiced. The female lays her eggs in a leathery capsule, which she forms at the end of her body. The Ger- man cockroach carries the egg capsule about a month, and drops it just before the eggs hatch; about 36 cockroaches hatch from the capsule. The other kinds carry the egg capsules a day or two, then glue them to some ob- ject in a protected place; about 12 cockroaches hatch from each capsule after an incubation period of 1 to 3 months. PREVENTING ENTRY Cockroaches may enter the house from outdoors, in infested containers from other buildings, or from adjoining homes or apart- ments. To keep them out, fill all cracks passing through floors or walls, and cracks leading to spaces behind baseboards and door frames, with putty or plas- tic wood. Pay special attention to water and steam pipes entering rooms. Cockroaches develop in large numbers in dirt and filth. Thor- ough cleaning reduces the likeli- hood of heavy infestation. When you bring baskets, bags, beverage cartons, or boxes of food and laundry into the house, look for cockroaches that may be hid- ing in them, and kill any that you find. SPRAYS AND DUSTS Infestations can be controlled by applying insecticides in sprays and dusts. *W. BN-2289 Oriental cockroach: Above, female; below, male. (IY2 times natural size.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Science and Education Administration. [Washington] : Dept. of Agriculture, Science and Education Administration : For sale by the Supt.
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