Development of Microplitis similis (Hymenoptera: Braconidae) on two candidate host species, Spodoptera litura and Spodoptera exigua (Lepidoptera: Noctuidae)
Development of Microplitis similis (Hymenoptera: Braconidae) on two candidate host species, Spodoptera litura and Spodoptera exigua (Lepidoptera: Noctuidae)
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Microplitis similis（膜翅目：茧蜂科）在两种候选宿主物种斜纹夜蛾和甜菜夜蛾（鳞翅目：夜蛾科）上的发育
DOI：
10.1653/024.098.0250
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发表时间：
2015-06-01
影响因子：
1.4
通讯作者：
Huang, Guo-Hua
中科院分区：
文献类型：
--
作者：
Li, Shun-Ji;Huang, Ju-Ping;Huang, Guo-Hua
相似小蜂茧蜂(Micropltis Similis Lyle)是一种寄生在甜菜夜蛾(Spotor tera exigua(Hubner)(鳞翅目：夜蛾科)等夜蛾科)幼虫上的单生内寄生茧蜂。为了了解寄主选择、适合度和相似微体对寄主的影响，我们比较了寄生百分率、发育历期和对寄主生长的影响。甜菜夜蛾和斜纹夜蛾的寄生程度较高。棉铃虫Helicoverpa armigera(Hubner)幼虫；甜菜夜蛾和斜纹夜蛾的发育历期相似，分别为13.87±0.15天和13.69±0.42天。与对照幼虫相比，寄主的生长发育受到严重影响。寄主作为3龄幼虫寄生后可以蜕皮到4龄，但不能发育到5龄。斜纹夜蛾幼虫寄生后4d(斜纹夜蛾3d)体重与未寄生幼虫相近，但从5d(斜纹夜蛾4d)开始差异显着。寄主幼虫最终比未寄生的幼虫体重轻50%至80%。寄主幼虫在寄生蜂羽化后在同一龄期内存活时间较长，但体重并未增加。
Microplitis similis Lyle (Hymenoptera: Braconidae) is a solitary endoparasitic braconid that generally parasitizes larvae of Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae) and many other noctuid species. To understand host preference, fitness, and the effects of Microplitis similis on the hosts, we compared percentage parasitism, development periods, and the effects on host growth in candidate noctuid species. We found high levels of parasitism of Spodoptera exigua and Spodoptera litura (F.) larvae but not of Helicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) larvae. The parasitoid wasp larvae took similar amounts of time for development on Spodoptera exigua and S. litura larvae, i.e., 13.87 +/- 0.15 and 13.69 +/- 0.42 d, respectively. Compared with the control larvae, the growth and development of the hosts were severely affected. The hosts were able to molt to 4th instars after being parasitized as early 3rd instars, but were unable to develop to the 5th instar. The body weight was similar between parasitized and non-parasitized larvae within the first 4 d (3 d in S. litura) but later began to show a significant difference from the 5th day on (4th day in S. litura). The host larvae eventually weighed up to 50 to 80% less than the non-parasitized larvae. Furthermore, the host larvae lived for an extended period in the same instar after egression of the parasitoid, but the body mass did not increase.