Results of testing the significance of the slope of fitted linear models.

*<p>N = 15.</p><p>A two-tailed t-test was applied to test the null hypothesis that a given slope was equivalent to zero. A significance level of 0.05 was used to determine if the null hypothesis could be rejected. The values are the t-value and p-value reported by the lmList function of the R package lm rounded to two decimal places. N-values represent the number of data points used in each model fit. The t-test degrees of freedom are therefore N–2.</p

Antifungal activity in social/eusocial, communal and solitary thrips species.

<p>Slopes of fitted regressions of AdjDensity ( =  difference between treatment and control OD) on time, plotted against 6 concentrations of antifungal extract from 6 thrips species assayed against the entomopathogen <i>Cordyceps bassiana</i>. The species, their levels of organization and the number of replicates are given in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0049737#pone-0049737-t001" target="_blank">Table 1</a>. Red indicates social <i>Kladothrips arotrum</i> and <i>K. antennatus</i> and the eusocial <i>K. intermedius</i>; black indicates communal <i>Teucothrips ater</i> and blue indicates solitary <i>Haplothrips froggattii</i> and <i>H. varius.</i> Negative slopes indicate antifungal effect and magnitude indicates strength. Filled symbols indicate slopes significantly different to zero (<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0049737#pone-0049737-t002" target="_blank">Table 2</a>).</p

Characteristics of the experimental thrips species and details of number of replicates, gall numbers and contents.

<p>Characteristics of the experimental thrips species and details of number of replicates, gall numbers and contents.</p