Species and Occurrence of Parasitoids of Cnaphalocrocis medinalis in Nanning, Guangxi, China

• Published in: Plant Diseases and Pests(植物病虫害研究：英文版) Vol. 6; no. 2; pp. 9 - 11
• Main Authors: Liyun, Ren, Zhenhua, Xian, Peisheng, Qin, Jinfeng, Li
• Format: Journal Article
• Language: English
• Published: Cranston Wu Chu (USA-China) Science and Culture Media Corporation 01.04.2015
• Subjects: Apanteles; Braconidae; Chalcididae; Chalcidoidea; Cnaphalocrocis medinalis; Cypris; Encyrtidae; Eulophidae; Trichogrammatidae; 中国; 化学农药; 南宁; 姬小蜂科; 寄生蜂; 小蜂总科; 广西壮族自治区; 稻纵卷叶螟
• ISSN: 2152-3932

[ Objective] To specify the parasitoid species of Cnaphalocrocis medinalis in Nanning, Guangxi Zhuang Autonomous Region, and provide theoretic ref- erences for the reasonable utilization and using natural enemy. [ Method] Field investigation and indoor rearing observation were adopted to figure out species and quantity of parasitoids of C. medinalis in Nanning in 2011 -2013. [ Result] There are 19 parasitoid species of C. medinalis in Nanning, belonging to Ich- neamonoidea, Chalcidoidea. Of Ichneamonoidea, there are 11 species from Ichneumonidae and Braconidae. Of Chalcidoidea, there are 8 species from Chalcididae, Eulophidae, Elasmidae, Trichogrammatidae and Encyrtidae. Among these species, Stenomesius maculatus Liao and Apanteles cypris Nixon are dominant parasitoids in larval stage. In natural control conditions, S. maculatus Liao is most-widely distributed species with the most population, especially in the first half year, accounting for 89.7 % of the total parasitoid quantity ; in pesticide application field, the quantity of S. maculatus Liao accounts for 69.1% of the total parasitoid quantity, and in nonpesticide field, it accounts for 78.5%. [ Conclusion] Application of chemical pesticide has serious impact on the natural populations of parasitoids, therefore, chemical pesticides should be applied reasonably to ensure the survival of parasitoids.