摘要
为探明温度对以白茶为寄主植物的产虫茶昆虫米缟螟生长发育的影响,分别设置5个温度条件(31、28、25、22、19℃),研究温度对米缟螟各虫态平均发育历期、发育速率和存活率的影响,计算各虫态发育起点温度和有效积温.结果表明:温度对米缟螟各虫态平均发育历期影响显著,除卵的发育历期随温度的升高而缩短外,幼虫、蛹及未成熟期的发育历期均在25℃达到最小值,分别为(249.53±23.83)d、(12.94±1.27)d和(273.00±24.19)d;除蛹外米缟螟各虫态发育速率与温度呈极显著相关,其中卵的发育速率与温度呈线性相关,幼虫、蛹和未成熟期则呈抛物线相关;温度显著影响各虫态存活率,卵、幼虫、蛹及未成熟期各虫态存活率均在25℃最高,分别为94.0%、73.8%、91.3%和63.4%,22和19℃次之,31℃最低;幼虫及蛹存活率在31℃均为0,表明米缟螟不耐高温;卵、幼虫、蛹及未成熟期的发育起点温度分别为13.21、17.12、14.76和16.47℃,有效积温分别为117.94、870.88、149.70和1442.75日·度.研究结果与米缟螟在贵州息烽地区一年发生2至3代的事实大致相符.
In order to reveal the effects of temperature on the growth and development of Aglossa di- midiata parasitized on Litsea coreana, a laboratory experiment was conducted to study the mean de- velopment duration, development rate, and survival rate of A. dirnidiata at its different growth sta- ges at 31 ℃, 28 ℃, 25 ℃, 22 ℃, and 19 ℃, with the development threshold temperature and ef- fective accumulated temperature for different growth stages calculated. Temperature had significant effects on the developmental duration. Except that the development duration of egg was shortened with increasing temperature, the development durations of larva, pupa, and immature A. dimidiata were the shortest at 25 ℃, being 249.53±23.83, 12.94±1.27, and 273.00±24.19 days, respec- tively. There existed significant relationships between the development rates of A. dimidiata at its different growth stages and temperature, with positive linear relationship at egg stage, and quadratic relationship at larva, pupa, and immature stages. Temperature also had significant effects on the survival rate of A. dimidiata. The survival rates of A. dimidiata at its different growth stages were all the highest at 25 ℃, being 94.0%, 73.8%, 91.3%, and 63.4% for the egg, larva, pupa, and immature A. dimidiata, respectively, followed by at 22 ℃ and 19 ℃, and the lowest at31 ℃. No larva and pupa could survive at 31 ℃, suggesting that A. dimidiata was not resistant to high temperature. The development threshold temperature for egg, larva, pupa, and immature A. dim- idiata was 13.21 ℃, 17.12 ℃, 14.76 ℃, and 16.47 ℃, and the effective accumulated tempera- ture was 117.94, 870.88, 149.70, and 1442.75 day-degree, respectively. The results coincidedwith the fact that the A. dimidiata reproduced 2 or 3 generations a year in Xifeng area of Guizhou, Southwest China.
出处
《应用生态学报》
CAS
CSCD
北大核心
2012年第11期3045-3050,共6页
Chinese Journal of Applied Ecology
基金
贵州省优秀科技教育人才省长专项基金项目(黔省专合字[2008]11号)
贵州省社会发展攻关项目(黔科合SZ字[2009]3027号)
国家自然科学基金项目(31260526)资助
关键词
虫茶
白茶
米缟螟
生长发育
温度
insect-tea
Litsea coreana
Aglossa dimidiata
growth and development
temperature.
