Fuji Flavor Co.

Hamura, Japan

Fuji Flavor Co.

Hamura, Japan
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Hironaka M.,Hamamatsu University School of Medicine | Kamura T.,Okayama University | Osada M.,Hamamatsu University School of Medicine | Sasaki R.,Fuji Flavor Co. | And 3 more authors.
Journal of Economic Entomology | Year: 2017

Two species, the cigarette beetle Lasioderma serricorne (F.) and the drugstore beetle Stegobium paniceum (L.), are particularly important stored-product pests because they damage dry food. A previous study showed that L. serricorne adults are attracted more to ultraviolet (UV) and blue light wave ranges more than others such as turquoise, green, yellow, red, and warm white. However, the previous study did not equalize the amounts of light. The study also evaluated the attractiveness by the numbers of L. serricorne individuals that were lured to LED lights in a small box in the laboratory. In some storehouses, damage by S. paniceum is more serious and establishment of an effective monitoring tool is required. Therefore, in the present study, attractions of these beetles to UV and blue light traps were compared to develop a tool to monitor the beetle pests. First, adult L. serricorne and S. paniceum beetles were provided with UV-A nd blue-LED panels whose light intensities were equalized in the laboratory, and the walking and flying paths of each adult were recorded and measured. As a result, adults were clearly attracted to the side of UV-LED panel by walking compared to the blue one. Second, we compared the numbers of cigarette beetles collected by sticky sheets that were set in the back of UV or blue-light LED traps in a real storehouse. The results showed that these beetles were significantly more attracted to UV than blue-light LED traps, indicating the UV-LED trap is a powerful tool to monitor these two pest species. © 2017 The Authors.


Okada K.,Okayama University | Suzaki Y.,Osaka City University | Sasaki R.,Fuji Flavor Co. | Katsuki M.,University of Tokyo
Behavioral Ecology and Sociobiology | Year: 2017

Abstract: Although polyandry is common, it is often unclear why females mate with multiple males. While polyandry may provide females with direct or indirect fitness benefits, it can also be costly. Thus, investigating both the costs and benefits of polyandry is needed to understand the evolution of female polyandry. Here, we investigated the potential benefits and costs of polyandry to females of the cigarette beetle Lasioderma serricorne. We established two treatments: single mating and remating treatments. In the remating treatment, females had the opportunity to remate with a second male. This treatment had two outcomes, that is, acceptance or rejection of mating with the second male. Adult lifespans were shorter in females that accepted and rejected remating than the singly mating female, and there was no difference in lifetime fecundity. This suggests that polyandry is costly to the female and that the cost is due to excessive courting by second mates. Indeed, the direct cost was greater when the second mate was an attractive male. Moreover, we found no difference in offspring quality between females that mated once, accepted, or rejected an additional mating, indicating no indirect benefit of polyandry. Thus, polyandry is thought to carry fitness costs but not benefits to females in L. serricorne. Significance statement: Polyandry, in which females mate with multiple males, often provides females with fitness benefits, but it can sometimes be costly. Because the adaptive significance of polyandry remains controversial, investigating a cost-benefit balance of polyandry is needed to understand the evolution of female multiple mating. Thus, relationships between fitness consequences and polyandry have to be carefully investigated, and we focused on fitness consequences of females that mated singly, accepted, or rejected remating. When females of the cigarette beetle L. serricorne were courted by two males, the female lifespan decreased compared with singly mated female, even if the females did not experience multiple mating. This indicates a direct fitness cost to females due to contact with two males. Additionally, we found no difference in offspring quality between monandrous and polyandrous females. This suggests no indirect benefit of polyandry. In conclusion, polyandry is thought to carry female fitness costs in the cigarette beetle. © 2017, Springer-Verlag Berlin Heidelberg.


Katsuki M.,Okayama University | Arikawa K.,Graduate University for Advanced Studies | Wakakuwa M.,Graduate University for Advanced Studies | Omae Y.,Okayama University | And 4 more authors.
Applied Entomology and Zoology | Year: 2013

The cigarette beetle, Lasioderma serricorne (Fabricius), is an important pest insect that consumes a variety of dry foods. It is known that UV light traps attract this species. However, less attention has been paid to its preferred wavelength. First, we investigated the spectral sensitivity of the compound eye. Next, we compared the attraction efficiency of LEDs of different colors (wavelengths). Our results showed that ultraviolet (UV, 375 nm) and blue (470 nm) LEDs attracted the most cigarette beetles of both sexes, irrespective of mating or oviposition status, although the UV LED consistently tended to attract the most beetles. Although the primary sensitivity peak of the compound eye was 520 nm, the green LED (520 nm) scarcely attracted beetles. Although the reason for the difference between the peaks in spectral sensitivity and attraction of beetles awaits further studies, whether UV and/or blue LEDs is more effective as a practical light trap for controlling L. serricorne beetle is discussed in this study. © 2013 The Japanese Society of Applied Entomology and Zoology.


Tabuchi K.,Japan National Agriculture and Food Research Organization | Taki H.,Japan Forestry and Forest Products Research Institute | Iwai H.,Japan National Agriculture and Food Research Organization | Mizutani N.,Japan National Agriculture and Food Research Organization | And 3 more authors.
Environmental Entomology | Year: 2014

To determine differences in distribution patterns between the soybean pest Riptortus pedestris F. (Hemiptera: Alydidae) and its egg parasitoid Ooencyrtus nezarae Ishii (Hymenoptera: Encyrtidae) in source and cultivated habitats, we compared their abundances in soybean fields and forest edges, which were assumed to be the overwintering sites of R. pedestris. We set synthetic attractant-baited traps for both species over 2 yr in mid-August, just before R. pedestris normally colonizes soybeans. During one of the 2 yr, we also examined the rate of parasitism using an egg trap. The numbers of both R. pedestris and O. nezarae trapped at forest edges were higher than the numbers caught in soybean fields, suggesting that forest edges are important source habitats. Compared with R. pedestris, the abundance of O. nezarae in soybean fields was considerably lower than in forest edges, presumably because of differences in their dispersal abilities and their responses to landscape structure and resource distribution. Better pest control service by O. nezarae was provided at forest edges than in soybean fields. Therefore, when using pest control by O. nezarae in soybean fields, spatial arrangement and distance from the forest edge should be considered. © 2014 Entomological Society of America.


Romero-Frias A.,National University of Colombia | Romero-Frias A.,Antonio Nariño University | Murata Y.,Fuji Flavor Co. | Bento J.M.S.,University of Sao Paulo | Osorio C.,National University of Colombia
Bioscience, Biotechnology and Biochemistry | Year: 2016

The guava weevil, Conotrachelus psidii is an aggressive pest of guava (Psidium guajava L.) that causes irreparable damages inside the fruit. The volatile compounds of male and female insects were separately collected by headspace solid-phase microextraction or with dynamic headspace collection on a polymer sorbent, and comparatively analyzed by GC-MS. (1R,2S,6R)-2-Hydroxymethyl-2,6-dimethyl-3-oxabicyclo[4.2.0]octane (papayanol), and (1R,2S,6R)-2,6-dimethyl-3-oxabicyclo[4.2.0]octane-2-carbaldehyde (papayanal) were identified (ratio of 9:1, respectively) as male-specific guava weevil volatiles. Papayanal structure was confirmed by comparison of spectroscopic (EIMS) and chromatographic (retention time) data with those of the synthetic pure compound. The behavioral response of the above-mentioned compounds was studied in a Y-tube olfactometer bioassay, and their role as aggregation pheromone candidate components was suggested in this species. © 2016 Japan Society for Bioscience, Biotechnology, and Agrochemistry.


Endo N.,Japan National Agricultural Research Center | Sasaki R.,Fuji Flavor Company | Muto S.,Fuji Flavor Company
Environmental Entomology | Year: 2010

We investigated the attractiveness of a synthetic form of the pheromone of the soybean stink bug, Piezodorus hybneri (Gmelin), under field conditions, and compared it with that of (E)-2-hexenyl (E)-2-hexenoate, a pheromone component of a competitor, Riptortus pedestris (Fabricius). Many adult stink bugs were attracted to traps baited with 100 mg of the synthetic pheromone (1: 1: one mixture of β-sesquiphellandrene, (R)-15-hexadecanolide, and methyl (Z)-8-hexadecenoate),but few were attracted to 1 or 10 mg. More than twice as many females as males were attracted to this male-produced pheromone. None of the individual pheromone components (30 mg) attracted conspecifics. In summer (June-July), when field P. hybneri were not in diapause, (E)-2-hexenyl (E)-2-hexenoate was more attractive to P. hybneri than the synthetic pheromone. The sex ratio of the adults attracted to the synthetic pheromone was highly female-biased, yet almost equal numbers of both sexes were attracted to (E)-2-hexenyl (E)-2-hexenoate. Most females attracted to both attractants were mated and had mature ovaries. However, adults attracted to (E) -2-hexenyl (E) -2-hexenoate were likely to have less food in their stomach than those attracted to the synthetic pheromone. In late autumn (October-November), when the bugs were in reproductive diapause, both attractants attracted many sexually immature female and male adults that had well-developed fat body. The synthetic pheromone also attracted a large number of conspecific nymphs. These results suggest that P. hybneri pheromone and R. pedestris pheromone component, respectively, have different functions for P. hybneri. The male-produced pheromone system of P. hybneri seems to be sex-related but to have other roles. © 2010 Entomological Society of America.


Endo N.,Japan National Agricultural Research Center | Wada T.,Japan National Agricultural Research Center | Sasaki R.,Fuji Flavor Co.
Applied Entomology and Zoology | Year: 2011

Seasonal catches of the bean bug, Riptortus pedestris (Fabricius), captured in traps containing the synthetic pheromone, were investigated under different field conditions from 2005 to 2007. In soybean fields, the number of bugs attracted to the pheromone traps increased after flowering and peaked 9-13 days after flowering. After these attraction peaks, the populations of adult bugs and nymphs increased in soybean fields. In traps located in grassland, however, only small numbers of the bugs were caught during the soybean flowering stages (from mid August to early September). The sex ratio of adults caught in the pheromone traps differed among soybean growth stages. Before flowering, more males were caught than females. After flowering, trapped females increased in number and the proportion of females exceeded 0.5 throughout the flowering periods. These results suggest that attraction to the pheromone may be affected by host plant phenology, and that females, in particular, respond strongly to the pheromone during flowering of the host plant soybean. © 2011 The Japanese Society of Applied Entomology and Zoology.


Nakajima Y.,Kyoto University | Sakuma M.,Kyoto University | Sasaki R.,Fuji Flavor Co. | Fujisaki K.,Kyoto University
Annals of the Entomological Society of America | Year: 2010

Riptortus pedestris (F.) (Heteroptera: Alydidae) females oviposit not only on host plants but also on nonhosts, which may impose high costs on nymphs in terms of locomotion energy and time searching for host plants. Therefore, we hypothesized that second-instar nymphs have developed adaptive traits that help them access host plants, because the first feeding stage occurs during the second instar in this bug. We compared responses to the aggregation pheromone, relative leg lengths, and locomotion performance using a servosphere locomotion compensator as tests of physiological, morphometric, and behavioral traits, respectively, among the instars. We also investigated the effects of delayed feeding in the second instar on subsequent survival and development. Our results indicated that second-instar nymphs might have responded more sensitively to synthetic aggregation pheromone than other instars. Morphological measurements showed that second-instar nymphs had the longest relative leg length compared with other instars. The experiment using the servosphere revealed that second-instar nymphs had higher locomotion performance than did older nymphs, which may allow second-instar nymphs to walk a distance comparable to older nymphs, although their body size is much smaller. However, we did find that more than a 48-h delay in feeding after the first-instar molt decreased subsequent survival rates and that a later first-feeding led to a longer developmental period during the second instar. We concluded that R. pedestris nymphs have evolved various adaptive traits to enhance the probability of accessing host plants in response to the costly oviposition habit of adult females that lay eggs on nonhosts. © 2010 Entomological Society of America.


Omae Y.,Okayama University | Fuchikawa T.,Okayama University | Nakayama S.,Okayama University | Okada K.,Okayama University | And 3 more authors.
Applied Entomology and Zoology | Year: 2012

Adults of the cigarette beetle, Lasioderma serricorne (Fabricius), usually have brownish-red bodies. In this study, we selected for black body color and established a black body strain as a genetic marker. Subsequently, we conducted experimental crosses and discovered that the black body color was characterized by recessive inheritance. Moreover, we observed no difference between the mating behavior and life history of the black strain and normal beetles. On the basis of these results, our black strain could be a mutant in which only adult body color is genetically changed. Thus, our strain is thought to be a useful genetic marker to improve pest control methods for L. serricorne. © 2012 The Japanese Society of Applied Entomology and Zoology.


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Fuji Flavor Co. | Date: 2013-06-06

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