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Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
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Your Position :Home->Past Journals Catalog->2021年58 No.2

Effects of oviposition substrate pattern and sex ratio on the fecundity of Proteatia brevitarsis (Coleoptera: Cetoniidae)
Author of the article:ZHANG Guang-Jie;XU Tao;YANG Liu;MA De-Ying;LIU Yu-Sheng
Author's Workplace:Key Laboratory of the Pest Monitoring and Safety Control on Crop and Forest, College of Agriculture, Xinjiang Agricultural University, Urumqi 830052, China; College of Plant Protection, Shandong Agricultural University, Tai'an 271018, China
Key Words:Proteatia brevitarsis Lewis; spawning substrate; sex ratio; fertility
Abstract:
[Objectives]  To investigate the effects of oviposition substrate and sex ratio on the fecundity of Proteatia brevitarsis Lewis, improve the current fecundity parameters for this species, and design a composite oviposition substrate that will improve the fertility of insects that lay eggs in solid substrate. [Methods]  The effects of five different oviposition substrates (cow mature, sand, cow manure mixed with sand, cow manure and sand and cow manure and liquid sand) and five ♀∶♂ sex ratios (4∶8, 5∶7, 6∶6, 7∶5, 8∶4), on adult fecundity, mortality and hatching rates were measured and compared. [Results]   Oviposition substrates can be ranked in adult fecundity as follows: cow manure and sand > cow manure mixed with sand > cow manure > cow manure and liquid sand > sand. Female fecundity was highest (129.0 eggs/40 d) on a substrate comprised of cow manure and sand, fecundity on this substrate was 1.72 times that on cow manure, which is the natural substrate. The five sex ratios can be ranked in terms of overall female fecundity as follows: 7∶5>8∶4>6∶6> 5∶7>4∶8, and in terms of average fecundity per female: 4∶8>6∶6>5∶7>7∶5>8∶4 (up to 3.60 eggs/day). Neither substrate nor sex ratio had a significant effect on adult mortality or hatching rate; the hatching rate was > 90% in all cases. Based on investigation of the natural sex ratio, the optimal sex ratio for ensuring high fertility is 1∶1. [Conclusion]  Choice of oviposition substrate and adult sex ratio can significantly improve the fecundity of P. brevitarsis; maximum fecundity was obtained with an oviposition substrate comprised of cow mature and sand and an adult sex ratio of 1∶1.


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