Temperature and prey density on bionomics of Coccinella septempunctata (Coleoptera : Coccinellidae) feeding on Aphis gossypii (Homoptera : Aphididae) on cotton
文献类型: 外文期刊
第一作者: J Y. XIA
作者: J Y. XIA;W. VAN DER WERF;R. RABBINGE
作者机构:
关键词: Coccinella septempunctata;Aphis gossypii;bionomics;temperature;prey density
期刊名称:ENVIRONMENTAL ENTOMOLOGY ( 影响因子:2.377; 五年影响因子:2.298 )
ISSN: 0046-225X
年卷期: 1999 年 28 卷 2 期
页码:
收录情况: SCI
摘要: Life history parameters of Coccinella septempunctata L. feeding on Aphis gossypii Clover on Gossypium hirsutum L. were determined in 2 experiments. The Ist experiment addressed the effect of temperature (15, 20, 25, 30, and 35 +/- 0.5 degrees C) on C. septempunctata bionomics supplied with unlimited food. The 2nd experiment addressed the effect of food quantity on the beetle's bionomics at 25 degrees C. Relationships of life cycle parameters with abiotic and biotic factors were described by mathematical equations. C, septempunctata developed most rapidly at 35 degrees C, with a preimaginal period of 10.8 d. Survival from egg to adult was highest at 25 degrees C (47%). Oviposition was greatest at 25 degrees C, with a lifetime oviposition of 287.4 eggs per female and a mean oviposition rate during the reproductive period of 22.4 eggs per female per day. Threshold temperatures for development of the respective stages ranged from 10.9 to 13.9 degrees C, with 12.6 degrees C for the entire life span. The thermal constant was 42.0, 103.7, 63.6, and 302.9 DD for eggs, larvae, pupae, and adults, respectively. Over the range of prey densities tested, a 3.5-fold increase in prey density resulted in a 2-fold reduction in larval development time and a 3-fold increase in larval survival. A 2-fold increase in prey density brought about a 2-fold increase in lifetime oviposition and mean oviposition rate.
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