摘要
以莲草直胸跳甲Agasicles hygrophila Selman & Vogt为对象,测定了在不同高温(37,39,41,43,45±0.5℃)下暴露1h后,莲草直胸跳甲成虫寿命、产卵前期、产卵量及后代存活力等生殖适应性指标的差异。结果表明:(1)莲草直胸跳甲成虫寿命随暴露温度的升高而降低,25℃恒温条件下,雌成虫寿命平均为37.4d,而45℃高温暴露1h后,雌虫寿命仅为20.0d;(2)莲草直胸跳甲雌虫的产卵前期随暴露温度升高而显著延长,25℃恒温条件下雌虫产卵前期平均为4.1d;39℃高温暴露1h后产卵前期延长至4.8d,45℃高温暴露1h后延长至7.3d;(3)短时高温暴露显著降低莲草直胸跳甲的单雌产卵量,25℃恒温条件下单雌产卵量平均为965.1粒,39℃暴露1h后,其产卵量为638.7粒,45℃暴露1h后低于260粒;(4)短时高温暴露对莲草直胸跳甲后代存活能力有显著的影响,随着温度的升高,F1代卵的孵化率从95.4%降低至89.2%,F1代成虫的羽化率从87.0%下降到71.3%。以上结果表明,短时高温暴露导致莲草直胸跳甲生殖适应性下降。
In this study,the longevity,reproduction and survival rate of Agasicles hygrophila adults under different high temperatures (37,39,41,43 and 45±0.5℃) for 1 h were studied. The results showed that: (1) Adult longevity of A. hygrophila species was decreased with the temperature increasing. It was 37.4 d on average at 25℃ (control). However,it dropped to 20.0 d after exposure at 45℃ for 1 h. (2) Pre-oviposition period of female A. hygrophila prolonged significantly after exposure to high temperatures over 39℃ ...
出处
《昆虫学报》
CAS
CSCD
北大核心
2009年第10期1110-1114,共5页
Acta Entomologica Sinica
基金
国家"973"计划项目(2009CB119200)
国家科技部支撑计划项目(2006BAD08A18)
关键词
莲草直胸跳甲
空心莲子草
高温暴露
生殖力
寿命
羽化率
生物防治
Agasicles hygrophila
Alternanthera philoxeroides
high temperature exposure
fecundity
longevity
emergence rate
biological cntrol
