Toxicity Responses of Herbaceous and Woody Ornamental Plants to Chlorine and Hydrogen Dioxides

Fig. 7. Rhododendron sp. with necrotic spots on the lower leaf surface from 4 applications of ZeroTol at 10200 ppm (orange tag). Damage also resulted from 4 applications of ZeroTol at 2700 and 5400 ppm. No injury resulted from water.



Image from Plant Health Progress article:
Toxicity Responses of Herbaceous and Woody Ornamental Plants to Chlorine and Hydrogen Dioxides