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

Figure 8

Frequency distribution of the fore-femorotrochanteric length of first-instar nymphs to be alates with (indicated by black) or without (indicated by grey) the next-instar cuticle developing inside. (a) Colony 15228 (left) on 12 September 2015 and colony 14160 (right) on 10 October 2014; (b) colony Exp#7 on 1 October 2015.

(a)

(b)