. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 177 this point. Ninety-two per cent believed that a cold spring is favorable to the disease; more than seventy-five believed the wet weather also to be a factor. Six and seventeen per cent, respec- tively, expressed opinions opposing the view that cold and mois- ture are influencing factors. The memorable leaf-curl years in New York and Ohio, 1893, 1897, and 1898, were preceded by. Fig. 64. Peach Leaf Curl cold and humid conditions during April, the time when the buds n
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. ASCOMYCETES 177 this point. Ninety-two per cent believed that a cold spring is favorable to the disease; more than seventy-five believed the wet weather also to be a factor. Six and seventeen per cent, respec- tively, expressed opinions opposing the view that cold and mois- ture are influencing factors. The memorable leaf-curl years in New York and Ohio, 1893, 1897, and 1898, were preceded by. Fig. 64. Peach Leaf Curl cold and humid conditions during April, the time when the buds normally start. On the other hand, there is no record that the peach leaf curl has ever been particularly destructive during a warm and relatively dry spring. So firm is the opinion of a few of the practical growers as to this climatic relationship that they refuse to believe anything more than that the weather is the direct cause of the leaf curl. Moreover, heavy dews appear to be of in- significant environmental importance, and in view of the conditions developing dew, this would be 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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