. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. PTTRTJc; FRTITTR §20 killed back so rapidly that the leaves shrivel up on the branches before they fall off. It is seldom, however, that the disease kills the branches so rapidly. Fig. 1 illustrates the effects of withertip in killing back small branches. 5. Control measures consist in pruning out the affected twigs and branches and destroying them. The pruning should be done preferably in December and January, while the trees are dormant. However, if it becomes necessary to prune during the growing season it should be done in Jul
. Cirtus fruits under irragation. Citrus fruits; Fruit-culture. PTTRTJc; FRTITTR §20 killed back so rapidly that the leaves shrivel up on the branches before they fall off. It is seldom, however, that the disease kills the branches so rapidly. Fig. 1 illustrates the effects of withertip in killing back small branches. 5. Control measures consist in pruning out the affected twigs and branches and destroying them. The pruning should be done preferably in December and January, while the trees are dormant. However, if it becomes necessary to prune during the growing season it should be done in July after the first growth has hardened; pruning should not be done while the tree is growing vig- orously. Not only the dead branches should be pruned out but also all the branches that show a slight sign of the dis- ease. Sometimes only one side of a tree or only one branch is se- verely affected, and the rest of the tree is unin- jured. The distance to which the disease has progressed can fre- quently be detected by the presence of new shoots that have a sickly yellow color. In pruning smooth cuts should be made, usually at the base of a limb, in order that no stubs be left on the tree. The larger wounds should be painted with either carbolineum, pine tar, grafting wax, or asphalt paint made with benzine; turpentine should not be used in making the asphalt paint, because it causes the paint to harden too rapidly. The young developing foliage and fruits may be protected by spraying with Bordeaux mixture. Bordeaux mixture tends to kill the parasitic fungi that keep down scale insects. For this. Fic;. 1 li\ UUl^l^ blAl'ES reason it should be used only when absolutely necessary, and when used should be followed some weeks later with a good insecticide to keep the scale insects in check. The withertip disease on citrus varieties other than limes is brought on or aggravated by conditions unfavorable for the growth of the tree. 6. Antliracnose.—The fungus causing anthracnos
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Keywords: ., bookcentury1900, booksubjectcitrusfruits, booksubjectfruitcultur
