日本応用動物昆虫学会誌
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
59 巻, 1 号
選択された号の論文の16件中1~16を表示しています
特集:光防除の最前線
原著
  • 片井 祐介, 石川 隆輔, 土井 誠, 増井 伸一
    原稿種別: 原著
    2015 年 59 巻 1 号 p. 1-6
    発行日: 2015/02/25
    公開日: 2015/04/17
    ジャーナル フリー
    Irradiation of melon (Cucumis melo) seedlings with red LED light (wavelengths of 620 to 630 nm) at an intensity of 1×1018 photons m-2 s-1 decreased the number of Thrips palmi (melon thrips), a major insect pest that causes serious damage during greenhouse melon cultivation. Thrip populations were significantly lower than in treatments without LED, both with continuous 24-h irradiation and with 12-h daytime (06:00 to 18:00) irradiation. Transplanted seedlings were also irradiated with red LED light of two different intensities (4.7×1018 photons m-2 s-1 or 1.0×1018 photons m-2 s-1) in two cultivation environments (glass or plastic greenhouse). These findings suggest that irradiation with red LEDs may be an effective means of controlling Thrips palmi in greenhouse melon cultivation.
短報
原著
  • 照屋 清仁, 熊野 了州
    原稿種別: 原著
    2015 年 59 巻 1 号 p. 17-22
    発行日: 2015/02/25
    公開日: 2015/04/17
    ジャーナル フリー
    A lot of sterile males need to be released continuously in the target area in the sterile insect technique (SIT). Therefore, mass-rearing of the target pest insects is indispensable for SIT programs. The West Indian sweet potato weevil, Euscepes postfasciatus, has been maintained for over 44 generations (~8 years) for its eradication program in the Okinawa Prefectural Plant Protection Center (Naha, Okinawa, Japan). The selective pressures under mass-rearing conditions are likely to be very different from those of wild ones. The specific selective pressures over many generations under mass-rearing conditions would adversely affect the reproductive capacity of mass-reared insects. Therefore, evaluation of the mating performance of mass-reared males compared with that of wild ones is indispensable in SIT eradication programs. Although we compared mating performance with respect to four reproductive characteristics (duration of mating behavior, mating success, mating competitiveness ability and number of transferred sperm in female spermatheca during copulation) between mass-reared and wild males in E. postfasciatus, there was no evidence that the mass-reared males were inferior to the wild males in terms of mating performance. Thus, we considered that the mass-rearing procedure for at least 44 generations did not adversely influence the male mating activity in E. postfasciatus.
  • 土田 祐大, 土井 誠, 多々良 明夫, 増井 伸一
    原稿種別: 原著
    2015 年 59 巻 1 号 p. 23-29
    発行日: 2015/02/25
    公開日: 2015/04/17
    ジャーナル フリー
    Alternative food sources provided by wheat and barley living-mulch were evaluated for the effect on the life history traits of the predatory bug, Geocoris proteus Distant. As alternative food sources, Rhopalosiphum padi (Linnaeus) and Anaphothrips obscurus (Müller) were provided to larvae and adults of G. proteus. Onion thrips, Thrips tabaci Lindeman and a standard food, Ephestia kuehniella (Zeller) eggs served as control food sources. The results showed that R. padi significantly prolonged the larval period and preoviposition period of G. proteus compared to the other prey species. However, R. padi made the female bugs more fecund than T. tabaci, though not so much as the standard food. Anaphothrips obscurus, though less than the standard food, was also nearly equal to T. tabaci in fecundity of the bugs. As a result, R. padi and A. obscurus were superior or nearly equal to T. tabaci in affecting the intrinsic rate of natural increase of G. proteus. These results suggest that wheat and barley would provide preferable alternative foods to G. proteus, thus serving well as living mulch.
  • 相澤 美里, 渡邊 丈夫, 山村 光司
    原稿種別: 原著
    2015 年 59 巻 1 号 p. 31-40
    発行日: 2015/02/25
    公開日: 2015/04/17
    ジャーナル フリー
    We investigated the dispersal distance of the onion thrips, Thrips tabaci Lindeman, using traps. In a greenhouse, fourteen hours after releasing thrips, we found insects at sticky traps up to 54 m from the release point. The estimated mean dispersal distance (±SE) was 7.4±0.25 m at thirty-nine hours after releasing thrips. In a field, forty-eight hours after releasing thrips applied with the fluorescent brightening agent, we found insects at traps up to 119 m from the release point. The estimated mean dispersal distance (±SE) was 66.6±10.7 m.
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