摘要
在实验室内以米蛾卵作寄主,观察了玉米螟赤眼蜂在5个恒温条件下(17,21,25,29,33℃)的发育羽化情况及成蜂寿命、产卵量和后代性比,实验中光照为14∶10(L∶D),相对湿度控制为75%.结果表明,玉米螟赤眼蜂完成一代所需的发育时间随温度的升高而减少,在17℃时完成一代需要25 12d,而在33℃时仅需要8 11d;在17～25℃成蜂羽化率最高,33℃时最低,其次是29℃;雌蜂的寿命在17℃时最长为219h,但随温度的升高而缩短,在33℃时仅为19 20h;在21～25℃范围内,雌蜂产卵量达到最高;所设定的5个温度条件下发育的雌蜂,其所产的后代中雌性均超过雄性,后代雌性百分率在17～29℃达到高峰,但在33℃时有所下降.
Trichogramma ostriniae Pang et Chen emergence, development time, longevity, fecundity and sex ratio were examined at constant temperatures of 17, 21, 25, 29, 33 ℃, 14∶10 (L∶D) and 75% relative humidity, developed in Corcyra cephaloica (Stainton) eggs in the laboratory. The percentage of emergency was the highest at 17-25 ℃, while the lowest was recorded at 33 ℃ followed by 29 ℃. The development time of the parasite decreased with increases in temperature. Mean female longevity of the adults ranged from 219 h at a constant temperature 17 ℃ to 19.20 h at 33 ℃. The highest fecundity was observed at 21-25 ℃. Females outnumbered males at all temperatures. The female percentage peaked at 17-29 ℃ and declined at 33 ℃.
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2004年第4期43-46,共4页
Journal of South China Agricultural University
基金
UNESCO/P .R .ChinaGreatWallCosponsorship
2 0 0 2
关键词
温度
玉米螟
赤眼蜂
生长发育
Trichogramma ostriniae
Corcyra cephaloica
temperature
development
effect CLC number: Q476.3Document code: AArticle ID:1001-411X (2004) 04-0043-04
