. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 270 FUNGOUS DISEASES OF PLANTS germination of the conidia. The observation has been made (Clinton) that the scab is first seen more abundantly on the lower leaves, and from this the inference is drawn that infection is chiefly as a result of the production of the perfect or Venturia stage on old leaves which have fallen to the ground. The pro- duction of the perfect stage is common when the leaves fall upon sod and are more or less protected by their own number or by being partiall
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 270 FUNGOUS DISEASES OF PLANTS germination of the conidia. The observation has been made (Clinton) that the scab is first seen more abundantly on the lower leaves, and from this the inference is drawn that infection is chiefly as a result of the production of the perfect or Venturia stage on old leaves which have fallen to the ground. The pro- duction of the perfect stage is common when the leaves fall upon sod and are more or less protected by their own number or by being partially covered with grass, Fig. i2i. Venturia Pom/, from Wintered Leaves of Apple Control. In the agricultural experiment stations of the United States spraying experiments have been quite generally conducted looking toward the prevention of apple and pear scab. Some dif- ferences in treatment have been recommended for regions where climatic relations are diverse, but in general the method of treat- ment is much the same. At least one spraying should be made with strong Bordeaux mixture before blossoming. In California it has been recommended to spray twice before the fruit buds have opened; this in case of the pear. A second (or third) spraying may be given immediately after the petals fall, and at. 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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