Abstract
Dutch elm disease was first discovered in California in 1975 and the State of California has since been involved in a program to eliminate all sources of infection from the counties where the disease has been located (Arciero 1979). However, the State is also funding research to develop methods for suppressing the fungus and vector, should the disease become more widely established in California, in the future. One of these methods is a trapping system using pheromone-baited traps to remove large numbers of the smaller European elm bark beetle. Scolytus multistriatus (Marsham), from cities such as Sacramento, which have large numbers of valuable elms.
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