Occurrence of Dulcitol as Exudate from Euonymus japonicus and E. europæus

Abstract

DURING the long period of drought and abnormally high temperatures of June and early July 1949, many bushes of Euonymus japonicus in the Bristol area were observed to possess a white incrustation on the upper surface of the leaves. In cases of weakly growing bushes, almost all leaves were affected ; but generally the heaviest incrustation occurred on relatively few leaves and appeared to be a dried exudate, probably due to damage by aphides, which were very prevalent. The incrustation was found mainly near the base of the leaves, and typical examples (see photographs) show the nodular nature of the material, which was easily dislodged from the smooth surface.