Plant Pathogens at Work: Progress and Possibilities for Weed Biocontrol Classical versus Bioherbicidal Approach

Fig. 5. (A, shown here) Initial field infection of yellow starthistle leaf in Tehama Co., California, by the biocontrol agent, Puccinia jaceae var. solstitialis (Photo by Baldo Villegas, CDFA) and (B) prolific greenhouse production of urediniospores (Photo by Bill Bruckart). Photos courtesy of Bill Bruckart.



Image from Plant Health Progress article:
Plant Pathogens at Work: Progress and Possibilities for Weed Biocontrol Classical versus Bioherbicidal Approach