. Diseases of fruits and nuts. Fruit; Nuts. Diseases of Fruits and Nuts 23 For control of mildew, cut out all mildewed twigs (fig. 9) very care- Fully every winter at the time of pruning. Spraying with liquid lime- sulfur, 1 or 2 gallons to 100 gallons of water (p. 160), or wettable sulfur, 6 pounds to 100 gallons (p. 160) in the cluster-bud stage, followed by a second application of the latter spray after most of the petals have fallen and, if necessary, a third spray two weeks later, should give excellent control. These sprays will also help to control scab (p. 25) and may be combined with l
. Diseases of fruits and nuts. Fruit; Nuts. Diseases of Fruits and Nuts 23 For control of mildew, cut out all mildewed twigs (fig. 9) very care- Fully every winter at the time of pruning. Spraying with liquid lime- sulfur, 1 or 2 gallons to 100 gallons of water (p. 160), or wettable sulfur, 6 pounds to 100 gallons (p. 160) in the cluster-bud stage, followed by a second application of the latter spray after most of the petals have fallen and, if necessary, a third spray two weeks later, should give excellent control. These sprays will also help to control scab (p. 25) and may be combined with lead arsenate for insects. Dusting with dry sulfur gives good control of apple mildew in some places. In certain districts, sulfur. Fig. 8.—Powdery mildew of apple on leaves. Normal twig on right. lias an injurious effect upon apple trees and it is unsafe to use more than V2 gallon of lime-sulfur to 100 gallons of water. Root-Knot Nematode.—Small beadlike galls develop on the roots of trees attacked by the root-knot nematode, Heterodera marionL The apple is not often seriously affected but sometimes, especially in sandy soil, this pest is found on the roots of apple trees. See page 142. Root Rot.—When trees die or look sickly and the roots are found to be more or less decayed, the name "root rot" is often applied. Trouble of this sort is produced in apple trees by various causes, sometimes by definite parasites like the oak-root fungus, and again by improper con- ditions such as poor drainage and heavy soil. Trees which die of root rot should be pulled out and destroyed. If the trouble seems to spread from tree to tree it may be handled as advised under "Oak-Root-Fungus Disease, Armillaria Root Rot" (p. 22), by. 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 Smith, Ralph E. (Ralph E
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