Occurrence Regularity of Myzus persicae and Aphidtransmitted Virus Disease in Zhenyuan County of Gui

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[Objective]The paper provided a reference for establishment of effective prevention mechanism against aphids in Zhenyuan tobacco area. [Method]The initial population quantity of aphids in early spring,migration of winged aphids,occurrence regularity and damage status of Myzus persicae and aphid-transmitted virus( PVY + CMV) were investigated in Zhenyuan County from 2014 to 2015 using 10-point checkerboard sampling method,yellow dish trapping method and 5-point sampling method. [Result] The total amount of aphids in Brassica campestris was the largest among overwintering hosts,with an average of 18. 44 specimen / plant. The migration of winged aphids presented bimodal pattern; the population dynamics of wingless aphids presented unimodal pattern,and the occurrence peak was from May to June.[Conclusion]Field control against M. persicae in tobacco fields should be conducted from mid May to early June. [Objective] The paper provided a reference for establishment of effective prevention mechanism against aphids in Zhenyuan tobacco area. [Method] The initial population quantity of aphids in early spring, migration of winged aphids, occurrence regularity and damage status of Myzus persicae and aphid- transmitted virus (PVY + CMV) were investigated in Zhenyuan County from 2014 to 2015 using 10-point checkerboard sampling method, yellow dish trapping method and 5-point sampling method. [Result] The total amount of aphids in Brassica campestris was the largest among overwintering hosts, with an average of 18. 44 specimen / plant. The migration of winged aphids presented bimodal pattern; the population dynamics of wingless aphids presented unimodal pattern, and the occurrence peak was from May to June. [Conclusion] Field control against M persicae in tobacco fields should be conducted from mid May to early June.
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