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ELEMENTARY AGRICULTURE 
Oak, rots. 
Oats, rust and smut. 
Onion, mildew, rust and smut. 
Pea, rust, root rot, and mildew. 
Peach, brown rot, leaf curl, mildew, scab. 
Pine, dry rot, rust. 
Plum, black knot, brown rot, plum pockets, and scab. 
Potato, blight, dry rot, and scab. 
Radish, club root and white rust. 
Rose, crown gall, mildew, rust. 
Rye, ergot, rust, smut. 
Sorghum, rust and smut. 
Squash, mildew, wilts, and root rot. 
Strawberry, leaf spot, mildew. 
Sunflower, mildew, rust. 
Sweet Potato, black rot, dry rot, soft rot, white rust. 
Tomato, blight, fruit rot, leaf spot, mildew. 
Violet, leaf blight, root rot, rust. 
Watermelon, mildew, wilt, leaf spot. 
Wheat, rust and smut. 
Willow, mildew, white rot, crown gall. 
It may be noted that many of the above plants have 
the same or similar diseases. Rusts and smuts generally 
' attack grains. Fruit trees are most often infected with 
brown rots, crown galls, mildews, and scabs. Blights are 
most common on garden vegetables and smaller plants. 
Timber trees appear to be more subject to white rots and 
heart rots. 
The Prevention of fungous diseases of plants is much 
more effective than curing them. It is very difficult to 
treat rusts and smuts in fields of grain. The best method 
of getting rid of these is to plant varieties that are re¬ 
sistant, or that do not have the diseases. Crop rotation 
does much to avoid fungi. Fruit trees have been very 
