Development of a Rapid Method Using Oxalic Acid to Assess Resistance Among Hosta Cultivars to Petiole Rot Caused by <i>Sclerotium rolfsii</i> var. <i>delphinii</i>

Fig. 3. Excised leaves of a susceptible cultivar (Munchkin, left) and a resistant cultivar (Gold Drop) after treatment with oxalic acid on cotton swabs, followed by 3 days of incubation at 100% relative humidity and 27°C.



Image from Plant Health Progress article:
Development of a Rapid Method Using Oxalic Acid to Assess Resistance Among Hosta Cultivars to Petiole Rot Caused by Sclerotium rolfsii var. delphinii