Figure 4. Seasonal dynamics of pollen at a multicrop (main plot) level, and within each of three crops. Week 26 is July 26, 2001, white bars = isoline, black bars = transgenic, x = p<0.1, * = p<0.05, ** = p<0.01. Timing of at-planting and foliar insecticide applications (see Table 1) noted by circles in isoline and triangles in transgenic cultivars. Note differences in scale among crops.