Although laboratory studies have demonstrated that UV-LED light attracts the Indian meal moth and the tobacco moth, they are seldom caught by conventional light traps equipped with a black light (BL) fluorescent tube. The wavelength predominantly emitted by BL and UV-LED light are almost equal, i.e., 360 - 370 nm, but the directivity of emitted light varies greatly among devices. Tests were conducted to ascertain the necessary light properties for attracting these moths, using BL and UV-LED light as trap lures. Although neither species was caught by BL, they were both captured effectively by LED light at intensities of 10^-3 - 10^-1 W/m² (15 cm distant from the LED at the axial center). Peak catches using the LED were observed at 10^-2 W/m²; catches decreased above that irradiance level. Furthermore, BL attracted tobacco moths when the light emitting area was restricted to a 1 cm slit at the width. These results suggest that the action of UV light is bifacial, i.e., UV light either induces or interferes with moth attraction depending on its irradiance. BL light is dispersed in all directions uniformly, which interrupts moth attraction around the traps, whereas the light from LEDs decreases outside the axial center, yielding dim light conditions around the trap. The Indian meal moth and the tobacco moth are caught by a light trap when the irradiance on the flight paths to the sticky surface of the trap is controlled within the designated range.

Overwintering flights of Halyomorpha halys and Menida disjecta at Tateyama fudokino-oka and Tateyama-sanroku kazoku-ryokomura, located near each other at the foot of Mt. Tateyama in Toyama Prefecture, have been investigated for over 25 years, beginning in 1995. Thirteen species of stink bugs from Fudokino-oka and 19 from Kazoku-ryokomura have been identified as overwintering flight stink bugs, since they fly to the walls of buildings and hide in slit traps set beside the buildings. A total of 70 species have been recorded as overwintering flight stink bugs in Japan; of these, 5 species were newly added in this study. Of the 70 species, H. halys and M. disjecta were the most predominant species at the two locations, respectively.

Overwintering flights of Halyomorpha halys and Menida disjecta at Fudokino-oka and Kazoku-ryokomura, respectively, both located at the foot of Mt. Tateyama in Toyama Prefecture have been observed since 1995. Distinct annual variations in the number of overwintering flight stink bugs have been observed. At Fudokino-oka, high numbers of H. halys were observed in 1997, 2000, 2001, 2005, 2011, and 2017-2019, and low numbers were recorded in 1998, 1999, 2007-2009, and 2013-2016. At Kazoku-ryokomura, the numbers of M. disjecta were high in 1995, 1996, 2000, 2001 and 2005, and low in 1999, 2002-2004, 2007, 2009, 2010, 2012, 2013, and 2015-2019.

Overwintering flights of Halyomorpha halys and Menida disjecta have been observed at the foot of Mt. Tateyama in Toyama Prefecture since 1995. No relationship between overwintering flight numbers of H. halys and the amount of snowfall was noted, while in contrast, it was observed that large overwintering flight numbers of M. disjecta co-occur with large amounts of snowfall in the winter (p<0.05). Emergence numbers of H. halys could not be predicted by the amount of pollen of the Japanese cedar Cryptomeria japonica in the spring. In the years when the daily maximum air temperatures during the periods of mating, oviposition and nymphal development (early May to early August) were high, large emergence numbers of H. halys were observed (p<0.01). Years with little rainfall during the molting period (late August to mid-September) and weak wind velocity during migration (late October to mid-November) brought large emergence numbers of M. disjecta (p<0.05).

An extermination program was in effect during the period from 2016 to 2019 at a food factory in the Kanto area where the German cockroach had proliferated. After the cockroach population was surveyed with baited traps, fenitrothion was sprayed in the factory and two different types of bait, hydramethylnon and indoxacarb, were set out for the extermination. An extermination rate of 99.5% was finally achieved.

Larvae of dipteran species were discovered in cigarette ends containing moisture in Okayama City, Japan and were reared in a room at 15-20°C. Adults of 5 species emerged and were identified as Coboldia fuscipes (Meigen) (Family Scatopsidae); Desmometopa varipalpis Malloch (Family Milichiidae); Fannia prisca Stein (Family Fanniidae); F. pusio (Wiedemann); and Atherigona orientalis Schiner (Family Muscidae).

The cockroach species Sigmella schenklingi was identified in Miyazaki Prefecture for the first time based on specimens collected on July 12-13, 2019. This Finding represents the third record of this cockroach in Japan.