日本応用動物昆虫学会誌
Online ISSN : 1347-6068
Print ISSN : 0021-4914
ISSN-L : 0021-4914
49 巻 , 1 号
選択された号の論文の5件中1~5を表示しています
原著
  • 徳丸 晋, 栗田 秀樹, 福井 正男, 阿部 芳久
    2005 年 49 巻 1 号 p. 1-10
    発行日: 2005年
    公開日: 2005/05/25
    ジャーナル フリー
    The insecticide susceptibility of the vegetable leafminer, Liriomyza sativae Blanchard, the serpentine leafminer, L. trifolii (Burgess), and the tomato leafminer, L. bryoniae (Kaltenbach), on kidney bean leaves were evaluated at 25°C under a 15L–9D photoperiod. Susceptibility to the tested insecticides varied among the developmental stages, species, and populations of the leafminer. Among the 25 insecticides tested on second instar larvae using an insecticide spraying tower, chlorpyrifos, isoxathion, cartap, thiocyclam, cyromazine, emamectin benzoate, pyridalyl, and spinosad were more toxic on the three Liriomyza species. Among the 20 insecticides tested on adult leafminers using the leaf dipping method, cartap and thiocyclam produced high mortality in the three Liriomyza species. The application of cartap, thiocyclam, emamectin benzoate, and spinosad reduced the number of feeding and oviposition punctures made by female adults of the three Liriomyza species on the leaves. None of the insecticides examined significantly affected the egg mortality of any of the three Liriomyza species.
  • 伊藤 清光, 古川 勝弘, 大久保 利通
    2005 年 49 巻 1 号 p. 11-22
    発行日: 2005年
    公開日: 2005/05/25
    ジャーナル フリー
    The possibility of reducing insecticide use for controlling direct sucking damage to potatoes by Aphis gossypii was investigated under field conditions. A laboratory experiment was also conducted to determine the possible cause of resurgence in A. gossypii treated with acephate. The susceptibility of A. gossypii to this insecticide was much lower than that of two other inhabiting aphids (Myzus persicae and Aulacorthum solani) and predators (Harmonia axyridis and Orius minutus), indicating that the resurgence of A. gossypii was probably caused by the elimination of natural enemies and competitors by this insecticide. In the field plot without insecticide application, there was no outbreak of A. gossypii (or other aphid species) observed due to suppression by indigenous predators (ex. ladybirds, lacewings, Orius bugs); e.g., the density of A. gossypii did not exceed 10 insects per compound leaf, and no other insect pests were conspicuous. Consequently, both the tuber yield and the starch value were comparable to those in the insecticide-treated plot. The indigenous predators inhabited the environment around the field over a wide area during the potato-growing season. These findings suggested that there is a possibility of realizing potato cultivation without the application of insecticides.
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