Fig. 3.

The effect of foliar sugar addition on mite abundance, and the relationship between mite abundance and powdery mildew colony abundance, on V. riparia. For control leaves (white) and leaves with foliar sugar experimentally added (black), the mean (± s.e.) is shown for (A) mite abundance before powdery mildew inoculation, (B) mite abundance 8 d after powdery mildew inoculation and (C) the relationship between the number of mites on each leaf and the number of powdery mildew colonies observed. An asterisk indicate significance <0·05.