On the other hand, the hare, grey partridge (Perdix cinerea), hedgehog, quail, lark, rook and stork find their way into the coniferous region as the forests are cleared.
The most destructive is Botrytis cinerea which forms orangebrown or buff specks on the stems, pedicels, leaves and flower-buds, which increase in size and become covered with a delicate grey mould, completely destroying or disfiguring the parts attacked.
Some parasites attack many hosts and almost any tissue or organ (Botrytis cinerea), others are restricted to one family (Cystopus candidus) or genus (Phytophthora infestans) or even species (Pucciniastrum Padi), and it is customary to speak of rootparasites, leaf-parasites, &c., in expression of the fact that a given parasite occurs only on such organs - e.g.
The sun is sufficiently powerful to cause the evaporation of the water in the grape through the skin without any preliminary loosening of the latter by the action of the botrytis cinerea or any other micro-organism.
On the Blue Nile the forest trees alter, the most abundant being the babanus (Sudan ebony) and the silag (Anogeissus leiocarpus), while gigantic baobabs, called tebeldi in the Sudan, and tarfa (Sterculia cinerea) are numerous.