COCKROACHES. COCKROACHES. Very Primitive insects. Ancestral forms lived 200 – 300 million years ago. Over 3,500 cockroach species exist in the world. About 60 species found in the US. . COCKROACHES AS HEALTH PESTS. Produce various secretions which can affect the flavor of food.
the flavor of food.
other gastro-intestinal disorders.
allergic reactions in some people.
1. The German cockroach.
2. The American cockroach
3. The Oriental cockroach
4. The Brown-banded cockroach.
A. Small cockroaches, usually winged, less than ¾” long
B. Large cockroaches, winged or wingless, greater than ¾” long.
3. Females carry the egg capsules until ready to hatch.
4. Nymphs are smaller than most roaches.