トビイロウンカ幼虫の齢期内発育に伴うブプロフェジンに対する感受性変動

概要

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The effect of buprofezin as a molting interferent was investigated in nymphs of Nilaparvata lugens. When susceptibility to buprofezin was examined in 4th-instar nymphs by 6h split-feeding with treated rice plants or topical application, susceptibility varied remarkably with 4th-instar nymphal development. The values for LC_<50> by feeding test and LD_<50> by topical application in the 0-6h after 3rd ecdysis were 570 ppm and 21.2ng/nymph, respectively. The most susceptible period in 4th-instar nymphs is 40-50h after the 3rd ecdysis when the LC_<50> and LD_<50> values are 0.47 ppm and 0.281ng/nymph, respectively. The susceptibility to buprofezin decreased again after 54h (approximately 10h before the next ecdysis). These changes in susceptibility to buprofezin may be linked to physiological changes following development after ecdysis in nymphs. To avoid an unstable LC_<50> value, continuous contact and/or feeding is recommended for buprofezin laboratory tests.
日本応用動物昆虫学会の論文
2000-05-25