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| Dynamic Monitoring（MED versus MEAM1） and Further Resistance Status of Field Population of Bemisia tabaci in Tianjin and Hainan |
| XIAO Si1，2，ZHENG Hui-xin2，YANG Zhong-xia1，ZHANG You-jun2* |
| 1College of Plant Protection，Hunan Agricultural University，Changsha 410128，Hunan， China；2Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China） |
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Abstract Selecting Tianjin Municipality and Hainan Province as representative regions， this paper monitored the dynamic state of cryptic species of Bemisia tabaci field populations in 2014 and 2017 and sensibilities of B. tabaci（egg，nymph，adult）from these 2 locations to several insecticides， including avermectin， thiamethoxam，spirotetramat，cyazypyr，pyriproxyfen，etc．The results showed that the population of B. tabaci from Tianjin was MED cryptic species，and population from Hainan was mixture of MED and MEAM1．The results of monitoring sensitivity of B. tabaci indicated that B. tabaci populations both from Tianjin and Hainan were still relatively sensitive to avermectin．But their resistance to cyazypyr and spirotetramat were increased faster，and certain resistance to thiamethoxam and pyriproxyfen were produced．Therefore，avermectin could be used as an effective agent for controlling B. tabaci in Tianjin and Hainan．While，cyazypyr and spirotetramat should be used restrictedly in the fields．
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Received: 10 May 2019
Published: 28 June 2019
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