. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 190 FUNGOUS DISEASES OF PLANTS when either flowers or fruit produced on the twigs have already fallen prey to the disease. In other words, the fungus must grow directly from the fruit or blossom into the young twigs, since it cannot readily penetrate the epidermis of the latter. Inoculation of the fungus into cuts on the bark will, however, also result in a twig infection. The effect of the fungus upon the twig is to produce a blight, the twig being completely killed as the disease
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 190 FUNGOUS DISEASES OF PLANTS when either flowers or fruit produced on the twigs have already fallen prey to the disease. In other words, the fungus must grow directly from the fruit or blossom into the young twigs, since it cannot readily penetrate the epidermis of the latter. Inoculation of the fungus into cuts on the bark will, however, also result in a twig infection. The effect of the fungus upon the twig is to produce a blight, the twig being completely killed as the disease progresses (Fig. 70). Peaches and apricots are more subject to the twig blight than other stone fruits. Mummied fruits. The fruit which has decayed may fall to the ground or hang upon the trees, gradually shrinking with evaporation each to a crumpled, dried mass, generally known as a mummy. These mummied fruits are the chief source of infection the following season under ordinary conditions. It has been determined that the spores produced one summer may, under certain conditions at least, live over until the fol- lowing spring. Further, the mycelium within the mummied fruits more readily lives until conditions favorable for growth the following season. It is also possible that the spores which have been blown about and adhere to bud scales, etc., may likewise cause infection the following year. Rot in market fruit. Not only is this fungus a cause of consid- erable loss in the orchard, but it also affects the fruit in shipment 01 on the market. When the spores are abundant in the orchard,. Fig. 70. Apricot Twig killed by the Brown Rot Fungus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Duggar, Benjamin M. (Benjamin Minge), 1872-1956. Boston ; New York : Ginn
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