Plant Fitness Assessment for Wild Relatives of Insect Resistant Bt-Crops
Figure 1
(a) Topographic map of California central coast, primarily Santa Cruz County, showing locations of four sites (Elkhorn Slough site was ~50 km south) used in year one (arrows) and of 90 1 m × 1 m plots established as 30 triplets of disked, field margin, and natural vegetation habitat plots in year two (GPS locations shown as white circles with black borders). (b) Example of disked field plot in year two, with T.R.F. Roubison spraying individual wild radish and wild mustard plants with Bt and denatured Bt amongst other forbs and grasses that emerged from soil seedbanks with the winter rains. Not shown are the associated field margin plot, which was within 5 m of the field, and the natural vegetation plot in uncultivated lands as shown in the distance.
