| 摘要 |
A device composed of a housing assembly having a passage or channels which form a passage when the housing assembly is in its closed position. The inner surface of the passage is treated with an appropriate insecticide in powder, dust or slurry form which will adhere to the passage wall surface. The passage of the housing assembly has an outer diameter of at least about 0.6 cm. The passage is dark. In a preferred embodiment, the passageway is arcuate and the passage walls are scored or ridged.
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