. The more important fruit tree diseases of Ontario [microform]. Fruit; Pulvérisation et poudrage en agriculture; Spraying and dusting in agriculture; Fruits; Exploitations agricoles. 10 of the trees. In order to do this it is necessary, except in the case of small trees, to send the man on the ground in underneath the trees, so that he may shoot the spray up them from beneath as well as do all the lower outer parts. Pruning. Good pruning before spraying makes it easier in three important ways to control Apple Scab. First, it is almost impossible to spray thoroughly a large tree with nume
. The more important fruit tree diseases of Ontario [microform]. Fruit; Pulvérisation et poudrage en agriculture; Spraying and dusting in agriculture; Fruits; Exploitations agricoles. 10 of the trees. In order to do this it is necessary, except in the case of small trees, to send the man on the ground in underneath the trees, so that he may shoot the spray up them from beneath as well as do all the lower outer parts. Pruning. Good pruning before spraying makes it easier in three important ways to control Apple Scab. First, it is almost impossible to spray thoroughly a large tree with numerous, thickly clustered branches, because the superfluous branches interfere with the mixture reaching all sides of the fruit and foliage; second, it costs less to spray a well pruned tree, because fewer gallons of mixture are necessary; third, well pruned trees let in the light and allow a free circulation of air much better than unpruned trees, and thus the moisture which is so favorable to the development of the Scab fungus will dry oil more quickly. Scab and Sooty Blotch for this reason will almost always be worse on unpruned trees. Black Rot Canker, Black Rot and Leap Spot {Physolospora cydoniae, Amaud). This disease is found in most parts of the Province, and is worst generally in poorly cared for and neglected orchards. In the apple growing districts east of Toronto it has caused serious injury to apple trees and much alarm to the growers. In that part of the Province, however, it is not by any means confined to neglected orchards. Ob- servations and experiments show that the fungus causing Black Rot Canker is unable to penetrate healthy bark, and can gain en- trance and produce cankers only through wounds due to various causes, such as winter injury, sunscald, carelessness in cultivation, pruning and picking of the fruit. Varieties of apples which are most susceptible to Black Rot Cankers are those which are too tender for the district and so suffer severely from winte
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectsprayinganddustingin
