File:Apple growing in the Pacific northwest (1911) (19719395746).jpg

Title: Apple growing in the Pacific northwest
Identifier: applegrowinginpa00youn (find matches)
Year: 1911 (1910s)
Authors: Young men's Christian associations. Portland, Or
Subjects: Apples; Fruit culture
Publisher: Portland, Or. , The Portland, Oregon, Young men's Christian association
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation

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INJURIOUS ORCHARD INSECTS 133 favored spray at this time, and when applied one to 60 seems to be thorcughly efficient. Black leaf "40." which is supposed to be a concentrated form of black leaf, is now recommended in place of the black leaf. Kerosene emulsion, containing 6 to 7 per cent of oil, is probably as efficient as black leaf and is cheaper, but needs more time and care in preparation. When used it should be properly made and thoroughly emulsified. Since these species cause the leaves to curl and is protected by them, the best results are obtained by spraying early, before the leaves curl badly, or, if later, the spray should Oe applied thoroughly and with considerable force to reach the lice. The Brown Apple Aphis. From observations and reports it would seem that next to the woolly aphis the brown apple aphis is, perhaps, the most serious plant louse attacking the apple in Oregon. This species not only feeds upon the leaves and the new growth, but also attacks the fruit spurs and fruit, the greatest damage being done to the spurs. Most of the at- tacks, however, are confined to the inner portions of the tree. Dr. Britton states that the eggs are smaller than those of the green apple aphis, and one often needs to hunt carefully in order to find them at all, as they are hidden around the buds, sometimes partly
Text Appearing After Image:
Orchaid. near Medford, Rogue River Valley, Oregon.

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