摘要
双斑截尾寄蝇Nemorilla maculosa Meigen(双翅目:寄蝇科)是草地螟Loxostege sticticalis和其他鳞翅类昆虫的重要寄生天敌,但国内外对其生物学特性知之甚少。为了揭示双斑截尾寄蝇的生物学特性,在22℃,光周期16L∶8D的室内条件下对成虫羽化时期,交配持续时间,产卵量和寿命及其与补充营养的关系等进行了实验观察。结果表明:双斑截尾寄蝇主要在08:00-10:00和14:00-16:00羽化。雄蝇比雌蝇早羽化1d,雌蝇羽化后可立即进行交配,但雄蝇羽化1d后才可交配;交配持续时间为10～54min,但多数为20～30min;平均产卵量为154.1粒,雌蝇平均寿命26.6d,雄蝇为10.2d,雌雄寿命差异显著。取食10%蜂蜜水的平均产卵前期为3.8d,平均产卵历期为15.4d;而且取食10%蔗糖水、葡萄糖水或蜂蜜水之间的成虫产卵量没有显著差异,但均显著高于取食清水或纯饥饿空白对照的;同时,取食补充营养的雌蝇寿命均显著高于取食清水或空白对照的,但雄蝇的寿命则不受补充营养的影响。取食补充营养的雌蝇寿命与产卵量为正相关,即雌蝇的寿命越长,产卵量越大。最后,就这些结果的应用价值进行了讨论。
The tachinid fly Nemorilla maculosa Meigen （Diptera： Tachinidae） is an important parasitoid of the beet webworm, Loxostege sticticalis L. （Lepidoptera： Pyralidae） and other lepidopterous pests. Bionomics of this parasitoid, however, has been less understood. The emergence, mating duration, lifetime fecundity and lifespan of N. maculosa adults in relation to various types of supplemental nutrition were investigated under laboratory conditions （22℃, L16：D8）. The results showed that N. maculosa adults emerge mostly during hours of 08： 00- 10：00 and 14： 00- 16：00 of the day although they could emerge at any time of the day. Males emerge usually one day earlier than females. Males mate at the second day after emergence while females mate immediately after emergence. Mating duration of the fly could last 10 - 54 min but mostly last 20 - 30 min. Number of eggs laid per female is 154.1 on average. Longevity of female and male is 26.6 and 10.2 days on average, respectively, and differs significantly under the same environmental condition. The preoviposition period of females is 3.8 days on average, and the durational time of egg-laying is 15.5 days on average. Feeding with 10% honey, glucose and sucrose solution showed no significant effect on lifetime fecundity of N. maculosa adults, but the flies fed with water or pure hungered laid significantly less eggs than those fed with sugar solution mentioned. Lifespan of female flies fed with various types of supplemental nutrition were significantly greater than that fed with only water or nothing. Lifespan of the males, however, was not significantly different whether they were fed with supplemental nutrition or not. Lifetime fecundity of the female adults was significantly and positively correlated to their lifespan when they were fed with various types of supplemental nutrition. The significances of these findings were finally discussed.
出处
《昆虫学报》
CAS
CSCD
北大核心
2008年第12期1313-1319,共7页
Acta Entomologica Sinica
基金
国家科技支撑计划课题(2005BA529A03
2005BA529A04)
关键词
双斑截尾寄蝇
草地螟
成虫
生物学
补充营养
Nemorilla maculosa
Loxostege sticticalis
adult fly
biology
supplemental nutrition
作者简介
陈海霞，女，1980年2月出生，硕士研究生，主要从事草地螟寄生蝇的研究
通讯作者Author for correspondence，E-mail：lzluo@ippcaas．cn
