List of poinsettia diseases

This article is a list of diseases of poinsettia (Euphorbia pulcherrima).

This also includes oomycetes Molybdenum deficiency affecting mature young leaves and producing upward leaf roll Sulfur deficiency causing young leaf yellowing Zinc deficiency producing general yellowing and stunting of new leaves Manganese deficiency, initiating on young mature leaves Ammonium toxicity produces V-shaped chlorotic bands starting at the leaf tip and accompanied by downward leaf cupping (> 0.2 ppm) Fluoride toxicity on tips and margins of young leaves and bracts (0.4 ppm in water) Lithium toxicity on older leaves (2 ppm)