| Show SPREAD OF FLO SMUT OF WHEAT area in which infected fields have been found has increased square miles GROW RESISTANT VARIETIES spores spore of disease are an carried from field to field farmers in infested area are urged to con suit cult county agent prepared by department a of f agriculture although there have hen been no serious commercial losses in this country rebutting from the spread of flat smut of wheat in the region ada adjacent a cent to st louis in illinois and missouri the area in which infected fields have been found has increased since 1021 1921 from 72 to about square miles and the united states department of 0 agrical flag lag smut of wheat smutted plant la Is stunted splinted compared with healthy plan plant t 1 i A ure re b 11 eve that attempts at eradication 02 re are likely likely to fall and that in arder ader 0 o check the spread of this dw als nse ense attention should be given to the A owlie of varieties immune or high ay iy resistant rei ren stant to the disease in aus 1 chere conditions are similar to eliose hose asi n some parts of this country fields betimes show losses as high tas 20 per cent and the infection ja in general Is like that of bunt or stinking d smut in our own wheat growing regions in two tuo states where this smut has been found parts of fields have shown losses Us blaa high hs 20 0 aie per 1 but it Is doubtful it if field losses there have ever been as much as 5 per cent of the crop highly resistant varieties A number of varieties of wheat grown in this area have abon found not to take the disease at all or to be highly resistant to it of the soft red winter cheats red hed rock hock stoner or marvelous Marve loua Pul Ful caster mammoth ilert and dietz aletz are in this class of the hard red winter cheats illinois 10 kC anred illinois 1241 12 41 and P are arc highly resistant if not immune nu berous other strains and varieties have shown high resistance but som varieties that have been very popular in this district have been found to take flag smut amut infection very readily wind carries spores investigations indicate the probability that the spores of the disease are carried by the wind from field to field and for this reason it Is doubtful if any qua quarantine randee measures can be ef in preventing its spread there Is strong indication that the growing of resistant varieties la Is the lie least expensive and most dependable method af preventing loss crup crop rotation also will help to keep the disease under tinder control for unless a variety Is completely resistant growing wheat after wheat will increase the infection in a field farmers within or near the infested area are urged to consult with their county agents or state experiment station and arrange to got get supplies of these recommended varieties for sowing this fall |
