The efficiency of cylindrical sticky insect traps and suspended nets

The efficiency with which the 5 in. diameter, white, cylindrical sticky trap and suspended tow‐net catch insects was assessed using Johnson's (1950) field comparison of the two with the suction trap recently standardized by Taylor (1962). The aerodynamic efficiency of the sticky trap was also calculated from Gregory's (1951) results. Comparing these two results shows that small insects behave very like inert particles during capture. Efficiency of the sticky trap is almost constant in winds from 2 to 10 m.p.h. Tables are given converting catch of small insects to aerial density in winds from 1 to 10 m.p.h. RESP-4733