. Diseases of fruit crops in the United States in 1920. Fruit Diseases and pests United States. 37 Minnogota (Lt-ach)- Not vtry prevalent; ovtr routheast quarter of state. .Wisconsin (Vaut,han)- Less than ayerage, alone, Mississippi River tluffs. Kansas (Melchers)- Present tat no damage toâ¢speak of. '. Fig. 10. Percentage loss from' apple rust as estimated .for 192O, Nature of from Rust. Three types of injury result from the attack of Gymnosporangium juniperi-viry^inianae; (l) Injury to the foliage, resulting in reduced assimi- lating surface. In some cases defoliation results;.thus L
. Diseases of fruit crops in the United States in 1920. Fruit Diseases and pests United States. 37 Minnogota (Lt-ach)- Not vtry prevalent; ovtr routheast quarter of state. .Wisconsin (Vaut,han)- Less than ayerage, alone, Mississippi River tluffs. Kansas (Melchers)- Present tat no damage toâ¢speak of. '. Fig. 10. Percentage loss from' apple rust as estimated .for 192O, Nature of from Rust. Three types of injury result from the attack of Gymnosporangium juniperi-viry^inianae; (l) Injury to the foliage, resulting in reduced assimi- lating surface. In some cases defoliation results;.thus Llliott in Arkansas â reports that "trees (Jonathans) were defoliated in July and August". In other cases a scorching of the leaves similar to spray burn occurs. This condition was reported by Fromme oh Black Twigs in Virginia. The foliage injury resulted in dwarfing the tret and reducing the size and quantity of the fruit. ' (2) Injury to the fruit. It appears that fruit infection is common on some varieties and rkre on others. There is also great variation in this respect. 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 Anderson, H. W. (Harry Warren), 1885-1971; United States. Plant Disease Survey. [Washington, D. C. ] : Plant Disease Survey, Bureau of Plant Industry, United States Department of Agriculture
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1921
