Flowering cherry trees are susceptible to a number of fungal diseases, including brown rot (also called blossom blight), black knot and Eutypa dieback. Once a tree is infected with a fungus, there's no cure. The damaged limbs must be removed and disposed of carefully away from the garden. These common fungal diseases can severely damage or kill a flowering cherry tree.Continue Reading
Brown rot infects the blossoms of the cherry tree just as they begin to fade in the spring. It appears first as tiny black dots on the blossoms and spreads to the limbs, moving down the limbs to the trunk. Limbs infected with brown rot must be pruned back at least 8 inches from the infection. Black knot also spreads in the spring. It overwinters inside knots on trees until the warmth and moisture of spring release and disperse the spores. It first appears on trees as corky knots that slowly turn green, then black. Black knot infection interferes with a tree's circulatory system, causing limbs to wither and die. Any knotty branches must be pruned away, at least 3 inches below the knot, during winter and early spring.
The fungus Eutypa lata causes cherry tree dieback during late spring and summer. It enters the tree in water drops through pruning-cut sites, causing limbs to suddenly wilt and die. Wilted limbs must be pruned back at least a foot from the infection. With all fungal infections, pruning equipment must be disinfected between each cut and between trees to prevent it from spreading. Fungicides can help prevent infection if used in early spring.Learn more about Trees & Bushes
Basic identification of cherry trees is done by inspecting the flowers, styles, fruit, leaves and bark. Cherry trees fall under the Prunus genus, and many other trees in the genus are similar. However, even a casual observer can use these factors to differentiate between a cherry tree and its relatives.Full Answer >
To minimize the risk of disease and to prevent dieback, Gardening Know How recommends pruning eucalyptus trees in the heat of the summer. Although this promotes the bleeding of sap, the tree heals faster in the heat. However, a wound dressing may be needed to stop excessive bleeding in some cases. Choose between hedge pruning, specimen pruning, coppicing or pollarding pruning.Full Answer >
Different types of cherry trees include Japanese, choke and pin. The Japanese cherry tree is grown as an ornamental and is prized for its profusion of pink or white blooms. This cherry tree grows best in hardiness zones 5 through 8.Full Answer >
Lilac bushes can become infected with two diseases called powdery mildew and lilac blight. They are much likelier to affect lilac plants in warm and humid climates.Full Answer >