It is a polyphagous species that attacks many fruit trees, vine etc. The attacked sprouts and fruits will be burned; Treatments with Systhane Plus 24 E, Thiovit Jet 80 WG, Kumulus DF, Topas 100 EC, Karathane M 35 CE. This is a young tree its second year in our garden, but was three years old when it came. The mould itself does not feed on the plant, however as it covers the leaf surface, it is blocking light and reducing photosynthesis, essential for plant growth. The larvae are not dangerous to the tree, they feed on the roots of the spontaneous herbaceous plants. Each tree picture category on the left gives you information about the specific tree types and lots of great pictures of that tree. It has 3-4 generations a year and winters as a larvae in a silky cocoon in the cracks of the bark. Perennial canker is a similar fungal infection caused by the Valsa cincta and V. leucostoma fungi, and causes oval cankers to appear on the branches and trunk. 10+ Japanese Ornamental Plum Tree Images. This disease has the ability to affect all plum tree varieties, and it causes the plums on the tree to form small white blisters which can eventually out grow the plum and cover the entire fruit. I've recently learned that our plum trees have plum pocket disease. I have little black/brown looking eggs attached to the stems and crevices of newly forming leaves on my plumb tree. Plum tree diseases like plum pox virus and plum rust are caused by pests like aphids. The plum produces fruits after 4-5 years from planting, and its longevity is about 30-40 years. Those will extend and will cover the whole leaf. These insects include aphids, scale, mealybugs and white flies. Fertilizing the fruit trees and spraying them with fungicides and pesticides is necessary to promote strong, vigorous growth. San Jose scale (Quadraspidiotus perniciosus). After the attack, the leaves have a parchment look, the flowers abort, and the plant stagnates from growth. and fruit trees. Plum tree treatments, most common diseases and pests of this fruit tree The plum tree (Prunus domestica) is a fruit tree that is part of the Rosaceae family. Coated leaves also might prematurely age (senesce) and die, causing premature leaf drop. The females lay their eggs directly on the fruit or on the leaves close to the fruit. The bacteria penetrates the tree through the stomata, but most of the infection are produced during grafting. Some of the most common plum tree diseases that are caused by fungal infections are black knot, brown rot, powdery mildew, verticillium wilt, perennial canker and plum pockets. The adults and larvae colonise the branches and leaves producing tissue necrosis. Treatments with Actara, Reldan 22 EC, Laser 240 SC, Affirm, Kaiso Sorbie. The cells that compose this tumors are big and deformed. The bacterial diseases affecting plums are crown gall, bacterial spot and shot-hole. If the attack is strong, the photosynthesis capacity is reduced and the yield too. Required fields are marked *, Plant Information - How to grow & treat against disease and pests, Plum tree treatments, most common diseases and pests of this fruit tree. My Damson fruit have stopped growing and turned yellow, they fall off when touched. This disease manifests on the young sprouts, leaves and fruits. The wounds grow from year to year and can evolve in open cancer. From your description you are dealing with aphids. Due to that the apricots lose their commercial value. So, the leaves will have a pierced look. Treatments on burgeoning: Bouillie Bordelaise WDG, Copernico Hi-Bio, Melody Compact 49 WG, Funguran OH 50 WP, Champ 77 WG. A powerful attack determine trees defoliation. In both cases, the knots and cankers eventually girdle the tree and kill it. Also, Blackthorn (Prunus spinosa) is an intermediate host in which the fungus multiplies, and after that migrates on cultivated species. A precursor to domestic plum and cherry trees, purple-leaf plum trees were named for their fruits before the modern edibles were cultivated. Enjoy these pictures of plum trees. On the leaves appears circular spots in whose right the tissue brunifies, and finally it breaks away from the rest of the leaf. Purple-leaf plum trees, also flowering plum trees or cherry plum trees, can add interest to your yard or garden with their dark red to purple foliage and abundance of white to light pink spring blossoms. Plum tree diseases may slow or stop production of the fruit crop. It has a generation a year and winters as a larvae in a cocoon on the top of the sprout. 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