. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. 162 FIELD CHOP PRODUCTION Great variation in the earliness of maturity, stiffness of straw, resistance to rust, and abundance of yield are to be found in almost all varieties. A great opportunity for improving the crop is therefore within reach of each grower if he will but take advantage of it. INSECT ENEMIES AND FUNGOUS DISEASES 150. confine Insect enemies. their attacks to â There are no important insects which the oat plant. Several insects that are destructive to wheat are al
. Field crop production; a text-book for elementary courses in schools and brief courses in colleges. Agriculture. 162 FIELD CHOP PRODUCTION Great variation in the earliness of maturity, stiffness of straw, resistance to rust, and abundance of yield are to be found in almost all varieties. A great opportunity for improving the crop is therefore within reach of each grower if he will but take advantage of it. INSECT ENEMIES AND FUNGOUS DISEASES 150. confine Insect enemies. their attacks to â There are no important insects which the oat plant. Several insects that are destructive to wheat are also troublesome to oats, chief among which are the chinch bugs, grass- hoppers, and the army worms. The most important of these in- sects and the methods for their control have been discussed in the chapter on wheat, and as the same methods may be employed to pre- vent their ravages on oats, they need not be discussed again. 151. Fungous diseases. â The most destructive diseases that attack the oat crop are the rusts and smuts. There are two kinds of rusts, the leaf rust and the stem rust, so called because they most commonly attack those parts of the plant. The leaf rust is more common than the stem rust, and is identified by the red spores on the leaves at harvest time. In seasons favorable for their development, the spores are frequently so plentiful as to ad- here to the harvesting machinery and the clothing of the har- vesters. There are two kinds of smuts that attack the oat plant. The loose smut is more common and far more destructive than the covered smut. The loose smut may be recognized in. Fig. â Covered and smut of oats. loose. 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 Livingston, George. New York, The Macmillan company
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