. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 240 FUNGOUS DISEASES OF PLANTS of these Nectrias are Nectria cinnabarina (Tode) Fr. and Nectria ditissima Tul. Both of these fungi seem to follow other injuries, but either may, after gaining a foothold, spread rapidly from plant to plant and be of the nature of an epidemic. Distribution. Nectria cinnabarina is very commonly distributed throughout temperate regions, at least, and may be found growing upon a great variety of hosts. It has been de- scribed as the probable cause of an
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 240 FUNGOUS DISEASES OF PLANTS of these Nectrias are Nectria cinnabarina (Tode) Fr. and Nectria ditissima Tul. Both of these fungi seem to follow other injuries, but either may, after gaining a foothold, spread rapidly from plant to plant and be of the nature of an epidemic. Distribution. Nectria cinnabarina is very commonly distributed throughout temperate regions, at least, and may be found growing upon a great variety of hosts. It has been de- scribed as the probable cause of an occasion- ally destructive disease of currant canes, and in the same state it unquestionably exists as a parasite upon the pear. The horse-chestnut, the china berry, and other trees in various parts of the country frequently show the effects of its injuries. Durand submits evidence to the effect that it is a more or less destructive dis- ease to currants throughout New York,1 and it has been mentioned as a currant disease in other sections of the country, causing affected parts to dry up and eventually die. In Europe it is also known to cause disease in several hosts, all deciduous trees. The fungus. The disease seems to infest particularly the cambium and soft bast. It is therefore unlike its relative Neocosmospora, and would seem to be more or less localized, gaining entrance, as previously stated, through wound areas, and probably killing the twig or cane so soon as the latter is girdled. The hyphae are closely septate, and large stromatic areas are produced upon the epidermis or within the cortex (Fig. 102). These rupture the surface layer and appear as tuber- culiform stromata, crowned with minute, short, erect, or flexuous conidiophores which bear simple, ovate conidia. The general appearance of this stroma superficially is that of a pinkish disk. The conidial stage appears usually during the summer, and it is 1 This fungus is certainly not responsible for the common cur
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