Screening of Dominant Species of Triehogramma sp. and Evaluation of Field Control Effect

• 作者: Gao Chong Han Yehui Li Qingchao Liu Yang Wang Lida Yang Ying Zhao Xiumei
• 来源期刊: Plant Diseases and Pests(植物病虫害研究:英文版)
• 学科: 农学
• 关键词: Trichogramma sp. Osirinia nubilalis^Parasitic rate Control effect Yield increase rate
• 年，卷（期）: 2020,（3）
• 页码范围: 24-27
• 页数: 4页
• 分类号: S47

摘要

[Objective]The paper was to screen out the dominant species of Trichogramma sp.parasitized on Osirinia nub ilalis eggs and to evaluate the field control effect of Trichogramma sp..[Method]Six kinds of fresh egg masses of Trichogramma sp.parasitized on O.nubilalis were used to screen out three dominant species of Trichogramma sp.,and the single factor experimental design was used to evaluate field control effect.The dominant species were determined by combining yield,recovery yield loss rate and yield increase rate.[Result]T.osiriniae had the highest parasitic rate on O.nub ilalis;the parasitic rate of egg masses was 74.0%,and the parasitic rate of egg granules was 65.4%.The second was T.dendrolimi;the parasitic rate of egg masses was 62.0%,and the parasitic rate of egg granules was 59.5%.The parasitic rates of egg masses and egg granules of T.chilonis were 58.0%and 47.1%,respectively.The three Trichogramma sp.were the dominant bee species parasitized on O.nubilalis eggs.The average control effect of T.osirinae parasitized on O.nubilalis in the field was 73.86%;the average control effect of T.dendrolimi was 68.47%;and the average control effect of T.chilonis was 47.97%.The recovery yield loss rates was 9.58%,7.02%and 4.02%,and the yield increase rates were 9.65%,7.47%and 4.52%,respectively.[Conclusion]Considering the control effect and cost control comprehensively,T.dendrolimi should be used to control O.nubilalis in actual production.