mosaïque

Désignations

Codes : pays ou zone où la désignation a cours (CH, FR, DE, EU = Union européenne, INT = usage international). Une désignation barrée est déconseillée.

Définitions

anglais

a leaf symptom in which numerous small areas of discoloration stand out against a background of a different tint, tending to have a clearly defined boundary delineated by veins. A pattern of green angular areas against a predominantly yellow background may result; alternatively, the areas bounded by the veins may be chlorotic giving a yellow-on-green mosaic. If discrete areas of colour later coalesce a mottle symptom may result. (A Guide to the Use of Terms in Plant Pathology).