. Diseases of cereal and forage crops in the United States in 1921. Grain Diseases and pests United States; Forage plants Diseases and pests United States. v/hlte wheat (Fig. 35) is grovm in both the eastern and western parts of the United States. It is the leading class of wheat in v'/ashington, California, Oregon, and Idaho, ard is also important in New York and Michigsn. In these states it usually outyields the other classes of v/heat. Over three million acres of cornnon white v/heat are grovm annually in the United States- 't comprises somev/hat more than five per cent ci the total
. Diseases of cereal and forage crops in the United States in 1921. Grain Diseases and pests United States; Forage plants Diseases and pests United States. v/hlte wheat (Fig. 35) is grovm in both the eastern and western parts of the United States. It is the leading class of wheat in v'/ashington, California, Oregon, and Idaho, ard is also important in New York and Michigsn. In these states it usually outyields the other classes of v/heat. Over three million acres of cornnon white v/heat are grovm annually in the United States- 't comprises somev/hat more than five per cent ci the total v:heat acreage. I'.'ore than ^0 varieties of comn:on white wheat are grov/n, the leading ones being Pacific Bluestem, Goldcoin, Early Baart, Defiance, Dicklow, and Dawson Golden Chaff. Corjnon white wheat is used in making pastry flours and breakfast fvods and to some extent in bread-making Fig. 35- Distribution of common white wheat in the United States. Bunt caused by Tilletia laevis Kuhn and T. tritici (Bjerk.) V/i^t. Apparently bunt caused less damage in 192I than in 1920, or in an ayerag year. Tilletia laevis seems to be by far the more common of the bunt fungi- except in the Falouse district of the V/est where T. tritici is more abundant. V/hile it is not possible to make very definite statements on the basis of this year's reports, since many pathologists simply reported bunt and did not diffei' entiate between T. laevis and T. tritici, it is quite evident that east^of the Mississippi River most of the bunt is caused by T. laevis. The same thing is true in the spring wheat region. In Minnesota and the two Dakotas T. laey;^^ certainly is more abundant, and T. tritici occurs only rarely. \^liich form i£ principally responsible for losses in the hard winter wheat area is not indica- ted in the reports of collaborators, although it probably is T. laevis• Relative prevalence and importance of bunt in 1921 3unt was unimportant east of the Mississippi River during
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Keywords: ., bookcentury1900, bookcollectionbiod, bookdecade1920, bookyear1922
