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

[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 campestrii 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. [ABSTRACT FROM AUTHOR]