Insect attractants are being given increased research atten- 
tion to improve or reduce the cost of surveys and to open up 
hew opportunities in integrated control of forest insects. Some of 
these materials are powerful enough to lure insects over consider- 
able distances. Attractants of many kinds are being studied, but 
those consisting of natural chemicals produced by host plants or 
the insects themselves are receiving the most attention. 
tion (665, 666, 667). 
INTEGRATED CONTROL 
Integrated control is defined as a pest Management system that 
in the context of the associated environment and the population 
dynamics of the pest species, utilizes all suitable techniques and 
methods in as compatible manner as possible and maintains the 
pest populations at levels below that causing economic injury. 
In forest insect control, this would seem to encompass many of 
the methods discussed in preceding sections on applied control. 
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