Control. - Pick and burn diseased leaves. Spray the plants with bordeaux mixture, 4-4-50. Rust (Puccinia chrysanthemi). - Reddish brown rust pustules on the leaves.

Control. - Avoid wetting the foliage when watering. Spray as for Leaf Spot. Corn. Ear-rot (Diplodia zeae). - Several other organisms may cause an ear rot, but this is the more common one. The ear is imperfectly developed, soft, and overrun with a whitish mold. In many cases the husks and silk are also involved.

Control. - Destroy old infected ears and stalks. Practice a rotation which will exclude corn for two years from or near the given plat of ground. Rust (Puccinia maydis). - Reddish pustules on the blades. Common on some varieties of sweet corn.

Control. - No satisfactory method of control is known. Smut (Ustilago zeae). - Attacks stalks, ears, and tassels, producing abnormal boils or outgrowths. Will infect at actively growing points at any time.

Control. - Rotate crops. Do not manure corn ground. Cut out smut and burn it. Soaking seed is of no avail. Cotton. Anthracnose (Colletotrichum gossypii). - Forms black or purplish colored spots on bolls. Disease also occurs on seed leaves and on the leaves and stems. Select seed from fields free from the disease. Rotate crops. Use disease-resistant varieties. Root-rot (Ozonium omnivorum). - Easily recognized by the sudden wilting and dying of the plants in the field.

Control. - A combination of rotation of crops and deep fall plowing is effective. Wilt (Fusarium vasinfecta). - Causes a gradual wilt and eventual death of leaves and stems.

Control. - Rotate crops. Secure seed of wilt-resistant varieties of cotton. Cranberry. Blast or Scald (Guignardia vaccinii). - The fungus causes a blast of the flowers and very young fruits, and attacks older fruits, causing them to appear scalded or watery.

Control. - Spray five or six times with bordeaux mixture, 5-5-50, to which has been added 4 pounds of resin fish oil soap, making the first application just before the blossoms open. Long lines of hose are most satisfactory for this work, and the spraying must be done thoroughly. Rot. (Acanthorhynchus vaccinii). - A disease which cannot be distinguished from scald with the naked eye. Control. — As for Scald. Hypertrophy {Exobasidium oxycocci). - Appears on the young leaves soon after the water has been let off in the spring. The axillary leaf buds are attacked and produce short shoots with rather close, enlarged, swollen, and distorted leaves which are pink or light rose color. The production of fruit is prevented or reduced.

Control. - Early spraying with bordeaux mixture has been advised. Cucumber. Anthracnose. - See under Muskmelon, p. 274. Blight or Mildew (Pseudoperonospora cubensis). - A blighting and premature yellowing of the foliage.

Control. - Spray with bordeaux mixture, 5-5-50. Commence to spray when the plants begin to run, and repeat every ten to fourteen days throughout the season. Wilt (Bacillus tracheiphilus). - This is a disease caused by bacteria that get into the sap tubes of the leaf and stem, clog and destroy them, causing the plant to wilt. The bacteria are distributed chiefly by the striped cucumber beetle.

Control. - Control the striped beetle. See p. 318. Gather and destroy all wilted leaves and plants. Wilt (caused by malnutrition). - Excessive fertilizing with highly nitrogenous fertilizers will sometimes produce a peculiar curling and wilting of the leaves. Currant. Anthracnose (Glaeosporium ribis). - Small dark brown spots, chiefly on the upper surface of the leaf. The leaves finally turn yellow, and fall in July or August.

Control. - Thorough applications of bordeaux mixture, 5-5-50. Leaf-spot (Septoria ribis, Cercospora angulata etc.). - Whitish spots with black centers. Appears in midsummer, and causes defoliation.

• Control. - As for Anthracnose. Wilt or Cane-blight. - A destructive fungous disease which causes the canes to die suddenly. Character of the wilting much like that produced by the cane-borer.