Latest Cover

Online Office

Contact Us

Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
Sponsored by:Chinese Society of Entomological;institute of zoology, chinese academy of sciences;
Address:Chaoyang District No. 1 Beichen West Road, No. 5 hospital,Beijing City,100101, China
Tel:+86-10-64807137
Fax:+86-10-64807137
Email:entom@ioz.ac.cn
Your Position :Home->Past Journals Catalog->2015年52 No.3

Interspecific competition between Aphis gossypii Glover and Acyrthosiphon gossypii Mordviiko at different temperatures
Author of the article:FENG Li-Kai1** GAO Gui-Zhen2*** Lü Zhao-Zhi2 JIA Hui-Min1 WANG Pei-Ling1***
Author's Workplace:1. Key Laboratory at Universities of Xinjiang Uygur Autonomous Region for Oasis Agricultural Pest Management and Plant Protection Resource Utilization, College of Agriculture, Shihezi University, Shihezi 832000, China; 2. Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
Key Words:temperature, Aphis gossypii Glover, Acyrthosiphon gossypii Mordviiko, coexistence, single species, competition
Abstract:[Objectives]  Aphis gossypii Glover and Acyrthosiphon gossypii Mordviiko coexist on cotton. This article aims to quantify their population dynamics, the proportion of alates produced and their spatial  distribution on cotton plants at different constant temperatures, both when in isolation and in sympatry. The effects of temperature on competition between the two species is analyzed and discussed. [Methods]  The same initial number of Ap. gossypii and Ac. gossypii were introduced to cotton plants at 21, 24, and 27℃, and their population dynamics, number of alates and spatial distribution record at fixed time intervals. The intrinsic rate of increase (rm), spatial  distribution and proportion of alates produced were taken as indices of competition. [Results]  rm of Ap. gossypii were larger than that of Ac. gossypii and coexistence had no significant effect on the rm of either species. The proportion of Ap. gossypii on cotton leaves was > 97%, whereas that of Ac. gossypii was 55%- 75%. Coexistence had no significant effect on the relative abundance of either species on leaves or stems, they both preferred the upper part of cotton plants. There were little differences between species. The proportion of Ap. gossypii increased with temperature relative to that of Ac. gossypii, irrespective of whether the species were in isolation or in sympatry, and Ap. gossypii had a greater preference for the upper part of the cotton. Coexistence had no effect on the distribution of Ap. gossypii at 21℃ and 27℃. However at 24℃, the ratio of Ap. gossypii increased on the lower part of cotton plants. The proportion     of alate Ap. gossypii declined significantly with increasing temperature whereas that of Ac. gossypii did not.       [Conclusion]  Interspecific competition between Ap. gossypii and Ac. gossypii had no effect on the reproductive parameters of either species but Ap. gossypii had stronger competitive ability at higher temperature. Temperature had little effect on the spatial distribution of  Ap. gossypii, and a limited effect on the vertical distribution of Ac. gossypii. Interspecific competition and intraspecific competition increased the proportion of alate Ap.gossypii.

 

CopyRight©2024 Chinese Journal of Aplied Entomology