2.8. Statistical analyses
To assess statistical significance of differences between treatments, each P. indica treatment (2.5% and 5%, respectively) was compared independently to the control using a two-sided students t-test ( Sokal and Rohlf, 1995) implemented in R ( R Core Team, 2013). The module t.test, which automatically adjusts for any unequal variance through use of the Welch approximation for degrees of freedom, was used for all comparisons. The mean value of all five plants for each of the four replicate pots per treatment was used as input to the t-test, and a p-value of .05 or less was considered statistically significant.