[Attack at the stalk bottom. Phytophthora nicotianae at Euphorbia pulcherrima]

control de enfermedades disease control enfermedades fungosas euphorbia pulcherrima fanaison fungal diseases higiene hygiene irrigation methods maladie fongique marchitamiento necrose necrosis phytophthora nicotianae pourriture des racines precipitation root rots stems tallo temperatura temperature tige wilting