<p>Aphid density in cotton patches (black triangle) and maize patches (red circle) in field landscape plots in 2008 (<b>A</b>), 2009 (<b>B</b>), and 2010 (<b>C</b>). The data for aphid density were log-transformed (ln(n+1)). *Significant differences between densities of aphid in cotton patches and maize patches at p<0.05. **Significant differences between densities of aphid in cotton patches and maize patches at p<0.01. Densities of accumulative aphid in cotton patches and maize patches at all sample dates of field landscape plots in 2008 (<b>D</b>), 2009 (<b>E</b>) or 2010 (<b>F</b>). Different lowercases above the bars indicate significant differences in densities of accumulative aphid in cotton patches and maize patches at p<0.05. Data are presented per square meter of crop plants (mean±SE) with separate field landscape plots used as replicates. Sample size of cotton patch and maize patch are both 20. N indicates the size of samples tested.</p
