A yellowish powdery mixture of zinc and lead oxides collects on the lead; it is skimmed off and sold as paint.
The anther consists of lobes containing the minute powdery pollen grains, which, when mature, are discharged by a fissure or opening of some sort.
Plucking one from the bush, she rolled the berry in her hand, removing the powdery haze from its surface.
Then the walls of the mother-cells are absorbed, and the pollengrains float freely in the fluid of the pollen-sacs, which gradually disappears, and the mature grains form a powdery mass within the anther.
The disease can be controlled with triazole fungicides, which also control powdery mildew.
