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. 2011 Sep 5;4:10.3402/ehtj.v4i0.7157. doi: 10.3402/ehtj.v4i0.7157

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© 2011 Carla S. Thomas et al.

This is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2 — (a) Stage over time for the 2006–2007 case study of planthopper-virus in Vietnam. (b) Frequency of indirect indicators by stage for the 2006–2007 case study of planthopper-virus in Vietnam.