Introduction to agriculture; practical studies in crop production Clarence Moores Weed

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1916 Excerpt: ... disease does not inoculate the soil so that the new tree is in no greater danger from Yellows than the trees set in other places in the neighborhood. Peach Rosette appears to be a sort of acute form of the Yellows disease. The whole tree may seem to be affected suddenly, sending out rosettes of short and slender twigs from all its branches, each twig being crowded with small yellowish leaves. Such trees soon die, and the only thing for the orchardist to do is to cut and burn them promptly. Fungous Diseases The Peach Leaf-curl is a vexatious disease that often causes the defoliation of the trees in spring. The young leaves become strangely curled and swollen before they fall off. The crop for the season is ruined in cases of severe attack. The disease is local as a rule and rather uncertain in its appearance, but is especially destructive during wet springs. Fortunately this Curl can be easily prevented by thorough spraying with lime-sulphur wash or Bordeaux mixture during the dormant season and before the buds swell. The lime-sulphur spray has the additional advantage that it destroys the San Jose Scale. The Brown Rot of Stone Fruits has been the most generally destructive disease in Peach orchards. The annual loss on this fruit alone caused by this fungus has been estimated at three million dollars. In addition to the damage done the fruit on the tree and after packing, the blossoms are destroyed, especially during wet springs. The removal of the mummied peaches upon and beneath the trees and spraying with dilute lime-sulphur washes are effective remedial measures. Many other fungous diseases affect the Peach. The Peach Scab is a serious and widespread malady of the fruit, shown by black specks or blotches upon the skin, the injury extending to the adjace... Это и многое другое вы найдете в книге Introduction to agriculture; practical studies in crop production (Clarence Moores Weed)