Defensive Nymphs of the Woolly Aphid Thoracaphis kashifolia (Hemiptera) on the Oak Quercus glauca

Figure 7

Lengths of fore-femorotrochanters of first-instar nymphs to be alates for 16 woolly colonies. Mean ± 2SE are shown by a red closed circle and two short horizontal bars on the vertical line which indicates the range. Number in parenthesis indicates the sample size. The colony codes shown below the horizontal axis are the same as in Table 1.