Development and fecundity of captive Harmonia sedecimnotata feeding on Aphis craccivora
中文摘要:
【目的】 明确纤丽瓢虫Harmonia sedecimnotata在室内条件下取食豆蚜Aphis
craccivora的生物学特性,为其规模化扩繁提供基础数据。【方法】 采用室内控制条件饲养,构建实验种群生命表,研究不同温度条件对纤丽瓢虫生长发育的影响,以及在(26±1)℃时纤丽瓢虫的繁殖特性。【结果】 15-30 ℃时,纤丽瓢虫均能发育,且各阶段的发育历期随温度升高而缩短。纤丽瓢虫卵-成虫历期在15、20、25和30 ℃时存在显著差异(P<0.001),分别为(42.30±1.21)、(31.86±1.46)、(18.59±0.89)和(15.73±0.87)d。纤丽瓢虫幼虫各阶段和蛹在25 ℃的存活率最高,分别为95.08%±1.76%、96.18%±1.41%、98.63%±0.97%、94.63%±1.64%和97.80%±1.81%。纤丽瓢虫卵-成虫的存活率在15、20、25和30 ℃时存在显著性差异(P<0.001),分别为20.00%±2.72%、41.11%±1.57%、64.76%±2.93%和48.89%±1.57%。纤丽瓢虫完成一个世代的发育起点温度为9.411 ℃,有效积温为300.703日·度。纤丽瓢虫实验种群的雌性比为0.51,产卵期为(79.56±63.59)d,单雌产卵量为(1
289.89±724.70)粒,卵孵化率为77.67%±2.49%,营养卵比例为10.67%±1.25%,雌虫寿命与产卵量呈正相关,世代净增长率(R0)为633.933,平均世代历期(T)为76.828,内禀增长率(rm)为0.084,周限增长率(λ)为1.088。【结论】 纤丽瓢虫具有较宽的温度适应范围和较高的繁殖能力,在生物防治方面具有较好的应用潜力。
英文摘要:
[Aim] To determine the biological
characteristics of the ladybird, Harmonia sedecimnotata, feeding on Aphis craccivora under laboratory conditions, in order to provide basic
dates to improve the mass-rearing of this species in captivity. [Methods] A population life table for a captive
population fed using controlled feeding was completed, and the effects of
different temperatures on the growth and development of H. sedecimnotata were measured. In addition, the reproductive characteristics of the population
at (26±1) ℃ are
described. [Results] Although all
ladybirds could complete their life-cycle at temperatures in the range of 15-30
ºC, the development period of each stage shortened with increasing temperature.
There were significant differences in the time required to develop from egg to
adult at 15, 20, 25 and 30 ℃ (P<0.001), which were (42.30±1.21), (31.86±1.46), (18.59±0.89)
and (15.73±0.87) d, respectively. The survival rates of 1st-4th instar
larvae and pupae were highest at 25 ℃ (95.08%±1.76%, 96.18%±1.41%, 98.63%±0.97%, 94.63%±1.64%
and 97.80%±1.81%, respectively) . There were significant differences in the
survival rate of all life stages at 15, 20, 25 and 30 ℃ (P<0.001), which were 20.00%±2.72%, 41.11%±1.57%, 64.76%±2.93%
and 48.89%±1.57%, respectively. The development threshold temperature and
effective accumulated temperature of a generation of H. sedecimnotata were 9.411 ℃ and
300.703 degree·days, respectively. The sex ratio of the experimental population
was 0.51, the oviposition period was (79.56±63.59) d, the number of eggs laid
per female was 1 289.89±724.70. The hatchability was 77.67%±2.49% and the
number of trophic eggs was 10.67%±1.25%. There was a significant, positive
correlation between fecundity and female longevity. The net reproductive rate (R0),
generation time (T), intrinsic rate of increase (rm)
and finite rate of increase (λ), were 633.933, 76.828, 0.084 and 1.088,
respectively. [Conclusion] H.
sedecimnotata can complete its life-cycle and has relatively high
reproductive capacity at temperatures in the range of 15 to 30 ℃. Consequently,
this species should receive more consideration as a potential agent of
biological control.