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A PHYTOPHTHORA ROT OF PEARS AND APPLES
Author(s) -
WORMALD H.
Publication year - 1919
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1919.tb06460.x
Subject(s) - sporangium , biology , phytophthora cactorum , botany , phytophthora , mycelium , horticulture , fruit rot , fungus , pear , fruit tree , spore
SUMMARY. In wet seasons Phytophthora Cactorum (Lebert et Cohn) Schröer sometimes produces a rot of apples and pears in this country, causing the fruit to fall. The rot in pears is characterized by a dark brown discoloration of the affected tissues accompanied by the appearance, at the surface, of clusters of sporangia, seen with the naked eye as glistening particles. In apples the discoloration is paler and sporangia are less readily produced; frequently the skin splits and the mycelium of the fungus is seen on the exposed surface as a whitish bloom. To keep the disease in‐check rotting fruit, whether on the ground or still on the tree, should be collected and destroyed.