. Diseases of field crops in the Prairie Provinces. Plants; Cultures de plein champ; Cultures de plein champ; Plantes. DISEASES OF FIELD CROPS. Figure 26.—Pea seeds affected by bacterial blight. Note watersoaked areas. Ascochyta Blight Ascochyta pisi, A. pinodella, and Mycosphaerella pinocles Ascochyta blight is caused by one or more of the fungi named above. This disease is widespread and, occasionally, has been a serious threat to the seed and green-pea industries in areas of abundant moisture. Appearance—Somewhat similar though distinguishable, symptoms are caused by the three parasites. Th
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. Diseases of field crops in the Prairie Provinces. Plants; Cultures de plein champ; Cultures de plein champ; Plantes. DISEASES OF FIELD CROPS. Figure 26.—Pea seeds affected by bacterial blight. Note watersoaked areas. Ascochyta Blight Ascochyta pisi, A. pinodella, and Mycosphaerella pinocles Ascochyta blight is caused by one or more of the fungi named above. This disease is widespread and, occasionally, has been a serious threat to the seed and green-pea industries in areas of abundant moisture. Appearance—Somewhat similar though distinguishable, symptoms are caused by the three parasites. The leaf spots caused by M. pinodes are purplish with indefinite margins. Fusion of the spots results in irregular brownish-purple blotches. The blotches on the stems are elongated at first; later, fusion of the blotches gives the entire lower stem a bluish cast. When small, pin-point infections appear on the flower parts, blossom drop commonly follows. The symptoms caused by A. pinodella on the plant are * 84. 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 work.. Canada. Agriculture, Department of; Canada. Dept. of Agriculture. Ottawa [Queen's Printer]