Within-field Pathogenic Diversity of <i>Phytophthora sojae</i> in Commercial Soybean Fields in Iowa

Fig. 1. Field map showing (a) Albert City field and Phytophthora sojae isolates collected from soil samples by grid location and (b) Albion field and P. sojae isolates collected from soil samples by grid location. Empty grids are areas of the field where isolates of P. sojae were not collected. Colors indicate soil drainage class where dark blue is very poorly drained; light blue, poorly drained; turquoise, somewhat poorly drained; and yellow, well drained.



Image from Plant Health Progress article:
Within-field Pathogenic Diversity of Phytophthora sojae in Commercial Soybean Fields in Iowa