. The care of trees in lawn, street and park. With a list of trees and shrubs for decorative use. Trees; Trees. CHAPTER VI CONTROL OF PARASITES E have seen in previous chapters the character and effect of parasitic attacks on trees, how they are recognized, and also that their dam- age can be checked and reduced to a large extent by the mere care of keeping the trees in vigor. We are now to consider specific methods of controlhng these fungus and insect injuries. Fungus Parasites. The fundamental principle in com- bating fungus attacks is to prevent the infection of the host plant by the spore
. The care of trees in lawn, street and park. With a list of trees and shrubs for decorative use. Trees; Trees. CHAPTER VI CONTROL OF PARASITES E have seen in previous chapters the character and effect of parasitic attacks on trees, how they are recognized, and also that their dam- age can be checked and reduced to a large extent by the mere care of keeping the trees in vigor. We are now to consider specific methods of controlhng these fungus and insect injuries. Fungus Parasites. The fundamental principle in com- bating fungus attacks is to prevent the infection of the host plant by the spores, or else to destroy these through the application of antiseptics or poisons, — so-called fungicides. But, if infection has already taken place, the spread of the disease is prevented by the destruction of the fruit-body of the fungus when formed, thereby reducing the crop of seeds, and also by burning the litter on the ground in which the fungus may live during one phase of its development. Careful pruning and painting of all wounds will prevent the location and sprouting of the spores of fungi. If this has been neglected or delayed, and an examination (under the magnifying glass or microscope) shows that the mycelia of fungi are already developed, the parasite may still be suffocated, if the mycelium has not progressed too far, by applying an antiseptic, like carbolineum, which, especially if hot, will penetrate for some distance, and then covering the wound with a heavy coat of paint, so as to exclude air 124. 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 Fernow, B. E. (Bernhard Eduard), 1851-1923. New York Holt
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