Fungous diseases of plants . inese Cling, and someothers. Among the plumsthe Japanese varieties suffergenerally in most sectionsof the country. The Amer-ican group of plums is alsosusceptible, and apparentlymore susceptible at the South than farther north. The Wild Gooseand Marietta plums are much less affected in all regions. Thenative cherries are more resistant than such as the Montmorency. The fungus. The small tufts of the fungus, commonly calledmold tufts, which appear on affected fruits and occasionally onblighted twigs are made up of conidiophores and the numerousconidia to which they
Fungous diseases of plants . inese Cling, and someothers. Among the plumsthe Japanese varieties suffergenerally in most sectionsof the country. The Amer-ican group of plums is alsosusceptible, and apparentlymore susceptible at the South than farther north. The Wild Gooseand Marietta plums are much less affected in all regions. Thenative cherries are more resistant than such as the Montmorency. The fungus. The small tufts of the fungus, commonly calledmold tufts, which appear on affected fruits and occasionally onblighted twigs are made up of conidiophores and the numerousconidia to which they give rise. The production of the aerialconidia usually indicates that the substratum is considerably pene-trated by the mycelium. This mycelium is light brown in color,rather closely septate, considerably branched, unequal in diameter,and somewhat nodulose or occasionally cellular in appearance. Itis often vacuolate and may contain bodies differentiated as restingmycelial cells, or perhaps properly designated Fig. 71. Section of Peach Twig affectedWITH THE MoNiLiA. (After Erw. F. Smith) 192 FUNGOUS DISEASES OF PLANTS On blighted branches of the peach the mycehum has beenfound (Smith) to grow most abundantly in the cambium and softbast, these tissues disappearing in large measure with the forma-tion of extensive gum pockets (Fig. 71). The conidiophores arise as short hyph^, which soon becomeseptate at the extremities, branched and nodulose. The branchingproceeds in an indefinite and usually irregular or semidichotomousfashion (Fig. 72, a and b). From the apex of these branchestoward the base conidia are rapidly cut off, these cells remainingfor a time simply moniliform or as branched chains, each con-striction between the nodulations eventually marking the line of
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