. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 374 FUNGOUS DISEASES OF PLANTS Control. In an endeavor to control smut in oats, bunt in wheat, and other more or less similar diseases, a careful study has been made of a variety of fungicides or toxic agents in solution, and of hot water. The hot water treatment of the seed grain is the method in more common use. This method consists in immersing for ten minutes in water at a temperature of from 132" to 133° F. It has been found desirable to put the seeds into a basket or per
. Fungous diseases of plants : with chapters on physiology, culture methods and technique . Fungi in agriculture. 374 FUNGOUS DISEASES OF PLANTS Control. In an endeavor to control smut in oats, bunt in wheat, and other more or less similar diseases, a careful study has been made of a variety of fungicides or toxic agents in solution, and of hot water. The hot water treatment of the seed grain is the method in more common use. This method consists in immersing for ten minutes in water at a temperature of from 132" to 133° F. It has been found desirable to put the seeds into a basket or perforated tin vessel, and this may be previously dipped into warm water at a temperature of about no0 to 1200 F., in order that the tempera- ture of the hot water may not be greatly reduced by using cold seed. The water in which the seeds are finally immersed should be retained during the ten minutes at a temperature of not less than 1300, otherwise additional warm water should be added during the process. Further- more, it is desirable to throw the seed into cold water be- fore treatment, so that the smutted seed may be floated and skimmed off, for the treatment would be of small value if the large quantity of spores still held within the kernels of smutted grain were not removed. The hot water method is effective, but since it appears somewhat complicated, it is now being superseded by a formalin treatment. In its simplest terms the latter consists in dipping the seed in a solution containing 1 pint of formalin to 30 gallons of water. The seed may be put into sacks or baskets of from \ to 1 bushel each, and, as before, immersed in the barrel of formalin solution for about ten minutes, drained, put away wet in the sacks, or heaped and covered for two hours and finally spread out to dry rapidly before danger of germi- nation. Shoveling over will facilitate the drying. Copper sulfate, potassium sulfide, and other germicides have also been Fig. 190. Ustilago Avenge: Ger
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Keywords: ., bookauthorduggarbe, bookcentury1900, bookdecade1900, bookyear1909
