Terminalia catappa L. （Myrtales: Combretaceae） is one of the main hosts of the oriental fruit fly, Bactrocera dorsalis（Hendel）（Diptera: Tephritidae）, the fruit of which emits methyl eugenol（ME）, which attracts male B. dorsalis. In this study, the attractiveness of fresh fruit to adult male flies was investigated. In laboratory assays using small cages and transparent traps, a significantly larger number of males were attracted to mature yellow fruits（6.78±2.56 flies）than to immature green fruits（1.06±1.77 flies）； however, similar results were observed in small cage assays with opaque white traps. These results suggest that visual information, such as fruit color, does not primarily influence the attractiveness of the fruit to male oriental fruit flies. On the other hand, additional experiments using a wind tunnel showed that the attraction of the male flies to ME was significantly reduced by 24 h exposure of the male flies to yellow fruit, but the attraction recovered in 1 week. These results suggest that the behavior of male B. dorsalis can be affected by consumption of T. catappa fruit.

The tomato leaf miner, Tuta absoluta（Meyrick）（Lepidoptera, Gelechiidae）, is a notorious transboundary pest of tomatoes native to South America that has recently invaded Asia via Africa and Europe. This species was first found in Japan in 2021 and has since been trapped in many prefectures using sex pheromone traps. Because non-target species are often captured in moth sex pheromone traps, the same is true for T. absoluta, so it is necessary to distinguish between non-target and target species when monitoring with sex pheromones. Among the 290 non-target male moths captured in traps with commercially available sex pheromone lures for T. absoluta in 2022 to 2023 at several locations in Japan, we identified all captured males and recognized 114 species belonging to 25 families. Among them, the sex pheromones of 22 species have been reported； however, their sex pheromone components do not coincide with that of T. absoluta. To facilitate reliable identification, morphological differences of adult males between T. absoluta and its close relative Phthorimaea operculella（Zeller）（Lepidoptera, Gelechiidae）, a known pest of solanaceous crops captured in the same traps, are discussed.

This study evaluated the effectiveness of carbon dioxide fumigant against bed bug adults and eggs. The test was conducted in a room populated by bed bugs. Bed bugs placed in test containers were exposed for two weeks in a test chamber with a carbon dioxide concentration of approximately 70% and a room temperature of approximately 25°C. Furniture inhabited by bed bugs was also treated in this chamber. The results demonstrated a 100% mortality rate for bed bugs after this treatment. Dead bed bugs that had fallen from the furniture were also found inside the chamber.

This study evaluated the effect of a carbon dioxide gas generator on bed bug attraction and revealed that the number of bed bugs captured was significantly different depending on the presence or absence of carbon dioxide. Bed bugs were significantly attracted to the carbon dioxide gas at 25°C, and were attracted to the gas generator in a temperature-dependent manner at the range of 10°C to 35°C. The carbon dioxide gas generator continuously attracts bed bugs, and the duration of activity depends on the amount of chemicals involved in the gas generation. These results indicate that higher temperature conditions enhance the reactions to carbon dioxide and the activity of bed bugs.