Abstract
The bait for Japanese beetle (Popillia japonica) traps as usually prepared loses its effectiveness upon exposure in the field. In an attempt to devise a method of maintaining the attractiveness of the geraniol and eugenol over a considerable period of time, these substances were vaporized by means of wicks of various lengths placed in small bottles containing the attractive agents. The results indicated that when wicks of a certain size were used in traps of two types, more beetles were captured than in check traps containing the bran-molasses mixture with the attractants added.

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