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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2014年51 No.1

Vertical distribution in the soil and population a in apple orchardsdynamics of Schizoneurella indic of Yunnan, China
Author of the article:ZHAO Xue-Qing1, LI Xiang-Yong1, CHEN Ai-Dong1** , LI Xun-Dong1 ,GONG Sheng-Xin2,YANG Yi-Juan2 ,SHI An-Xian2
Author's Workplace:(1. Institute of Agricultural Environment and Resources, YAAS, Kunming 650205, China;2. Zhaotong City Plant Protection and Quarantine Station, Zhaotong 657000, China)
Key Words: Schizoneurella indica, vertical distribution, population dynamics, soil
Abstract:

     [Objectives]  Schizoneurella indica Hille Ris Lambers, a newly reported pest, is widely distributed and has caused severe damage to apple trees in Zhaotong City, Yunnan Province. Research on the vertical distribution in the soil and population dynamics of S. indica was conducted to understand its occurrence and damage characteristics. [Methods]  The occurrence characteristics and population dynamics of S. indica in apple orchards ofZhaotongCitywere investigated in experiments conducted in pots and in the field during 2002-2006. [Results]  The populationpeakofS. indica was from September to December each year. The population’s rapid growth period was from May to July and the populatin growth rate was 200%-273%. The proportion of the population of S. indica at soil depths of 0-30 cm, 30-60 cmand > 60 cm was 49.0%, 27.0% and 24.0%, respectively. All instars and adults were observed throughout the year, but the fourth instars and wingless adults mainly occurred in winter. Alate aphids occurred only once a year from early November to late December. [Conclusion]  The S. indica population has one peak per year, and was found mainly at a soil depth of 0-30 cm. Population density declined with increasing soil depth. The alate aphid population was small and difficult to find in the field.

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