摘要
在相对湿度为50±10%,光周期L∶D=14∶10的人工气候室内,研究不同温度（26,28,30,32,34和36℃）棉蚜的发育速率、死亡率和繁殖力。结果表明：随温度升高,棉蚜的死亡率增加,繁殖率降低,寿命缩短;若蚜期从26℃的5.9d下降到34℃的4.4d,36℃时若蚜4d后若蚜的死亡率达99%,不能完成发育。在26,28,30,32和34℃时,若蚜的死亡率分别为17.5%,25.0%,25.5%,22.6%和22.0%。在28℃时,棉蚜特定年龄繁殖率（Mx）和净生殖率（R0）均达到最大,分别为14.0与53.0。在五个温度条件下,棉蚜内禀增长率（rm,d^-1）分别为0.304、0.398、0.385、0.245和0.124。通过模型拟合计算得出：棉蚜发育的最适温度为29.0℃,致死温度为35.5℃。棉蚜繁殖的最适温度为28.8℃;当温度上升到34.9℃时棉蚜不能够继续繁殖。伏蚜在28-30℃温度区间繁殖能力强,对棉花危害最大。
The development,death rate and reproduction of the Aphis Gossypii（Hom., Aphididae） were evaluated on detached cotton leaves at six high constant temperature （26℃,28℃,30℃,32℃,34℃, 36℃） in laboratory. The developmental periods of the immature stage ranged from 5.9 days at 26℃ to 4.4 days at 34℃. A constant temperature of 36℃ was lethal to the immature stage of Aphis Gossypii and death rate was up to 99% in four days. The death rate was estimated to be 17.5%,25.0%,25.5%,22.6% and 22.0% at 26℃,28℃,30℃,32℃,34℃. The age-specific fecundity and net reproductive number were at peak numbers at 28℃ with numbers of 14.0 and 53.0. The intrinsic rate of increase was estimated to be 0.304,0.398,0.385,0.245 and 0.124 at five temperatures. The optimum temperature for development was 29.0℃ and lethal temperature for development of cotton Aphid was 35.5℃. The optimum temperature for reproduction was 28.8℃ and lethal temperature for fecundity of cotton Aphid was 34.9 ℃ based on fitting model. Summer aphid appeared relatively great reproduction from 28℃ to 30℃, and seriously damaged to cotton growth.
出处
《新疆农业科学》
CAS
CSCD
2008年第A02期107-112,共6页
Xinjiang Agricultural Sciences
基金
国家科技支撑计划项目"棉花持续优质高效生产技术体系研究与示范"(2006BAD21B02)
新疆维吾尔自治区"十一五"重大专项"棉花生产关键技术开发
集成与示范"(200731133)
关键词
棉蚜
发育速率
死亡率
内禀增长率
生命表
温度
Aphis Gossypii
developmental rate
death rate
intrinsic rate of increase
life table
temperature
