Aphid consumption and residence time of larvae of flightless lady beetles, Harmonia axyridis(COleoptera : Coccinellidae), on aphid-infested plants
Aphid consumption and residence time of larvae of flightless lady beetles, Harmonia axyridis(COleoptera : Coccinellidae), on aphid-infested plants
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不会飞的瓢虫、异色瓢虫（鞘翅目：瓢虫科）幼虫的蚜虫消耗量和幼虫在蚜虫侵染植物上的停留时间
DOI：
10.1007/s13355-013-0163-9
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
Takahisa Miyatake
中科院分区：
文献类型：
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作者：
Satoshi Nakayama;Jun-ichi Takatsuki;Tomokazu Seko;Shoutaro Ando;Kazuki Miura;Takahisa Miyatake
通过人工选择，建立了一种不会飞的异色瓢虫品系，用于有效的生物防治。然而，由于成虫的生产成本较高，这种生物防治技术成本高昂。因此，重要的是要考虑到幼虫在生物防治中的作用。这项研究考察了不会飞的菌株的幼虫作为生防剂的可能性，并与野生型的幼虫进行了比较，研究了它们在受蚜虫侵染的植物上的行为。在1龄、2龄和4龄，以及在低密度和高密度下，不同品系在植物上的滞留时间和对蚜虫的消耗没有差异。然而，相比之下，不会飞的品系的三龄幼虫对蚜虫的消耗量往往较低，尽管它们在植物上停留的时间比野生型的三龄幼虫长。因此，我们的结果表明，不会飞的菌株在控制所有幼虫阶段的蚜虫方面与野生型没有什么不同，除了三龄以外。在此基础上，结合前人的研究结果，我们讨论了不同龄期放生的适宜性。
A flightless strain of the lady beetle,Harmonia axyridisPallas, has been established, by artificial selection, for effective biological control of aphids. However, this biological control technique is costly because of the high cost of production of the adults. It is, therefore, important to consider the utility of the larvae in biological control. This study examined the potential for larvae of the flightless strain to be used as biological control agents compared with those of the wild-type, in terms of how they behave on aphid-infested plants. We found no differences between the strains with regard to residence time and aphid consumption on the plant for the first, second, and fourth instars, and at low and high aphid densities. In contrast, however, aphid consumption by third-instar larvae of the flightless strain tended to be lower, although they remained on the plant longer than third-instar larvae of the wild-type. Consequently, our results suggest the flightless strain does not differ from the wild-type in its ability to control aphids across all larval stages, except for the third instars. On the basis of these results, and in conjunction with the results from previous studies, we discuss the appropriateness of different larval instars for release.