. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 200 Bulletin 236. 7. Preventive Measures. It is scarcely necessary to point out that every precaution should be taken to prevent bruises or injuries of any sort, since these make excellent infection courts for the entrance of the bacteria. All dead limbs and trees should be promptly removed from the orchard and burned. Old pear trees in the neighborhood of young apple orchards are often a constant source of infection, and, unless kept abso- lutely free o
. Annual report of the Agricultural Experiment Station. Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 200 Bulletin 236. 7. Preventive Measures. It is scarcely necessary to point out that every precaution should be taken to prevent bruises or injuries of any sort, since these make excellent infection courts for the entrance of the bacteria. All dead limbs and trees should be promptly removed from the orchard and burned. Old pear trees in the neighborhood of young apple orchards are often a constant source of infection, and, unless kept abso- lutely free of the blight, should be removed. A neighbor careless in respect to blight in his pear trees provides a dangerous source of infection. Cut out and burn every trace of twig blight from both pear and apple trees as soon as it is Fig. 77.—Pruned stub canker resulting from cutting away a watersprout with a knife used shortly before to cut out an active canker and not disinfected. When pruning, treat all cut surfaces with the corrosive sublimate or copper sulfate solution and keep them painted until healed. Treat all accidental wounds in the same way. Keep the body and main limbs of the tree free of watcrsprouts throughout the summer. In planting, choose trees with open or spreading crotches. Avoid excessive fertilizing with nitrogenous manures. Apply some form of phosphoric acid to ripen new 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 Cornell University. Agricultural Experiment Station. Ithaca, N. Y. : The University
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