Uromyces Erythronii, a rust, sometimes causes considerable injury to the foliage of species of Lilium and other bulbous plants, forming large discoloured blotches on the leaves.
White or grey spots may be due to Peronospora, Erysiphe, Cystopus, Entyloma and other Fungi, the mycelium of which will be detected in the discoloured area; or they may be scale insects, or the results of punctures by Red-spider, &c. Yellow spots, and especially bright orange spots, commonly indicat
Zn(OK)2] Zinc oxide is used in the arts as a white pigment (zinc white); it has not by any means the covering power of white lead, but offers the advantages of being non-poisonous and of not becoming discoloured in sulphuretted hydrogen.
discoloured הגייה עם משמעויות, מילים נרדפות, הפכים, תרגומים, משפטים ועוד