Behavioral response to thiosemicarbazide, phenylthiourea, bisthiosemi [methylene-bis (1-thiosemicarbazide)] and quinine hydrochloride presented as baits were determined by the gradual two-cup preference method. Although parameters (oral acute toxicity, water solubility and response of taste neural nerve) participating the taste effectiveness of the test compounds were different, no statistical difference in the taste stimulating effectiveness of these test compounds (expressed as a magnitude of the threshold for discrimination) was found. A cause of the similarity in the taste effectiveness is due to a masking effect of wheat flour.

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Trapping by pheromone ((Z, E)-9,12-tetradecadienyl-acetate) of Indian meal moth (Plodia interpunctella) was conducted at 40 houses in Shizuoka, Japan. One trap is set on kitchen, and another is set 2-5 meters away from house, such a garage, warehouse and porch of 2nd floor for one week on August 1993.
The moths were caught at 38 houses (inside) and 35 (outside) of 40 houses. Infestation rate are 95% and 87.5% separately.
Average number of captured moths per trap are 14.9 (inside) and 19.4 (outside). Traps are set at 12 points around residential area with 150 houses. At 9 points the moth activity was verified. Indian meal moth is very popular household pest in Shizuoka. It is very important for controlling Indian meal moth to protect from their inversion in food plant.

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Seasonal prevalence of flying insects was surveyed with light traps and sticky traps at a print factory in Toyama Prefecture from Oct. 1991 to March 1993. The numbers of insects captured with traps outside the factory had a peak in summer, whereas that inside the factory had a peak in early winter. No relationship was found in the prevalence between the number of insects trapped outside and that inside. More midges, Syndiamesa takatensis and Orthocladius glabripennis, and moth flies, Psychoda spp. were captured with light traps inside the factory than those outside. These results show that insects invade rarely through air suckers as well as insect-proof entrance of factory.

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We examined the anti-invading effects of the house-invading stink bugs by applying the marketting insecticide aerosols to the window frames of the buildings. On the results, it was found that cyphenothrin, prallethrin and phenothrin had higher preventive effects for Halyomorpha mista to invade the building. Menida scotti was also prevented by those insecticides but the preventive effect was about 10% lower than that for H. mista. It is supposed that these insecticide aerosols availably prevent for the bugs to invade the dwelling houses and small accomodations.

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Dermestes carnivorus found in a warehouse was reared in a laboratory. The adults preferred a moist dog food VITA WAN BEAF JERKIE^® to a dry dog food VITA WAN^®. When provided with the dry food, adults and larvae needed water supply for their survival, normal growth, and egg production. They took water directly from cotton soaked with water. When supplied with the dry food and water, the duration of the egg stage was 4-6 days at 25℃ and 12L-12D. The larval stage and the pupal stage lasted for 37-44 days and for 6-9 days, respectively under the summer room conditions. Measurements of the head width of the larvae indicated six instar stages of them. The duration of the 6th instar stage was 18 days including the prepupal period of seven days.

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The harbouring behaviour of adult German cockroaches was studied experimentally using slit shelter that its utilizable space was 10cm×10cm×0.5cm and it was stood vertically on bottom of a test container. The results of the experiments can be summarized as follows.
1. In case of only male adult given two shelters, its congregation was spaced-out gregariousness that the mode in the frequency distribution of nearest neighbour distance (NND; mm) was 10 to 15mm being approximately equal to the body length of test insects, and the cognitive distances among test insects had depended on the length of antennae. The distribution of male in shelters was generally equal, and it was identical kept with female. But, when single shelter was given, male had preferred the harbour and the congregation to the maintenance of NND.
2. In case of only female with egg capsule, in spite of number of shelters and tesed insects, female adult have shown peculiar harbouring behaviour that crowded in the low site of the shelter.
3. When male and female were lived in the same container in the experiment with two shelters, spaced-out gregariousness of male above-mentioned did not occur at all that perhaps originated from some factors being related to an existence of female.

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[in Japanese]

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Among cities such as Sapporo, Sendai, Shinjuku, Yokohama, and Nagoya, where Rattus rattus infestations have been experienced from the 1970s, the problem has disappeared in Sapporo. The causes of the disappearance were analyzed with aerial photographs for commercial districts. The mean road space per hectare (±SD) for Sapporo was 0.401±0.129ha, which was not singnificantly different from 0.379±0.194ha for Shinjuku (p>0.50) but was larger than that for any others (p<0.01). A coefficient of variation 32.2% for Sapporo was apparently smaller than that for any other cities. Roads in Sapporo, therefore, are generally wide but those in the other cities are vary in size. Wide roads in Sapporo prevented the rats from moving between blocks, and as a result the rat population declined.

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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[in Japanese]

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