Spectacular snow-white powdery balls were observed mainly on the branches and fruits of Z. mucronata trees. [...] These are the snow-white spore-producing galls breaking out of diverse organs of Z. mucronata[.]

The fungus causing galls on Z. mucronata in this study predominantly infects branches and fruits but could also be found on the veins and peduncles of leaves. In some cases the nodes of branches were most commonly affected while in most cases the infections were randomly distributed throughout the trees. The affected organs always reacted to give rise to galls that produced an abundance of white flour-like spores. The galls ranged from few millimetres in diameter to over the size of a golf ball, seemingly correlated to the size of the plant organ affected (compare Fig. 4).

Fig. 4.
Disease symptoms associated with C. chevalieri infection. A. Young infections erupting mainly from the nodes of a branch causing wilting of apical leaves. B. Fully developed infections on a branch from which most leaves were lost. C. Golf ball-sized gall strangling a branch. D. Almost all fruits had been infected on some trees. E. Young fruit infection showing seven galls just erupting from a single fruit. F. Infection at the peak where the fruit was completely transformed into several galls. G. Severe infections leading to branch death.