Factors that affect using suction traps to monitor the migration of Sitobion avenae (Fabricius)
Author of the article:DU Guang-Qing YIN Jiao CAO Ya-Zhong ZHANG Shuai LI Ke-Bin
Author's Workplace：State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy ofAgricultural Sciences, Beijing 100193, China
Key Words：Sitobion avenae, migration, suction trap, meteorological factors
Abstract：[Objectives] To test the factors that affect suction trap monitoring of winged Sitobion avenae (Fabricius). [Methods] We counted the number of winged, and non-winged, S. avenae caught in suction traps in the wheat fields for one year, and conducted regression and path analysis on these data. [Results] The results show that the number of winged S. avenae caught in suction traps was significantly correlated with the number and density of winged aphids in the field. Winged S. avenae in wheat fields also affected the number caught in suction traps. On the other hand, the number of winged S. avenae in suction traps also reflected conditions in the field. In the Langfang area, winged S. avenae appeared almost one week earlier in suction traps than in wheat fields suggesting that suction traps are a good way of monitoring this species. In order to understand how different meteorological factors impact on the immigration of winged S. avenae, we counted the number of winged S. avenae caught in suction traps in different hourly periods and correlated this with local meteorological data on temperature, humidity, wind direction and velocity. We used grey incidence analysis to examine the relationship between rainfall, temperature, humidity, wind direction and velocity on the number of winged S. avenae caught in suction traps. The results show that rainfall can effectively reduce the migration of winged S. avenae. In the early stage of immigration, temperature impacts most seriously on the numbers of winged S. avenae, and wind velocity can also have a big effect. [Conclusion] Suction traps are a good monitoring tool for S. avenae and temperature and humidity are important factors that affect the migration of winged adults of this species.