The attacked fruit will fall from the tree before its time. You should carry out treatments with insecticides specific to aphid control like Mospilan 20 SG. So, the production decreases significantly. When the humidity is high, on the surface of the spots appears the bacterial exudate as a white-yellow viscous pellicle. This bacteria penetrates into the tree through the wounds produced by the nematodes, hail etc. Gum or sap draining from a tree trunk or limbs is common in trees in the genus Prunus, which includes peaches and cherries, but it can happen in many species.This sap flow can be caused by biotic diseases, which are triggered by living organisms such … It is a species that has a generation a year and attacks some shrubs and fruit trees. The damage to the trunk of the tree is significant, and it is possible that the tree will not survive. The larvae penetrates into the fruit and feed with the pulp and stone. It is a polyphagous species that attacks some shafts and fruits trees. Gathering and burning of the leaves fallen on the soil; Treatments with Actara 25 WG, Reldan 22 EC, Laser 240 SC, Coragen 20 SC, Kaiso Sorbie. When is dry, the attacked tissue dries and comes off the leaf. The larvae of the first generations attacks the sprouts and feed with the inside of them, producing big losses to the newly established orchards. The wounds grow from year to year and can evolve in open cancer. After hatching, the larvae diggs galleries in the attacked fruits, leaving inside faeces. Also, they will weave some kind of nest, inside of which they eat. MANAGEMENT: They don’t like the drought and compacted soils. The larvae of the next generations penetrate in the fruits that will ripen, where it diggs deep galleries. The virus spreads through the infected planted material, through cicadas, aphids and pollen. My Damson fruit have stopped growing and turned yellow, they fall off when touched. Two Leucostoma Species Infect Fruit Trees. Peach rust produced by the fungus Tranzschelia pruni-spinosae. Remove all infected branches well below the infection. Apple leaf-curling midge (Dasineura mali). This disease can cause significant fruit loss. The tumors are having different sizes and forms. Treatments with Decis Mega, Reldan, Fastac, Actara 25 WG, Calypso 480 SC. Occasionally orange, thready growths may be observed on the cankers. 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. They stagnate from growing and in 2-3 years dry. It has a generation every 2 years and winters as an adult in the superficial layer of the soil. The adults appear in the spring and feed with the young leaves. Bladder plum gall produced by Taphrina pruni. Your email address will not be published. Leaves will turn, dark areas will develop around the crown and sap may exude from the bark. Black knot is caused by the fungus Dibotryon morbosum. Treat the tree with a sulfur-based fungicide before budding occurs, and withCaptan or a similar agent after. It has 3-4 generations a year and winters as a larvae in a silky cocoon in the cracks of the bark. Finally upon close inspection of the trunk you might see unique "D" shaped holes. Once honeydew-producing insects are suppressed, sooty molds will gradually weather away. The larvae of the third and fourth generations produce big damage to the fruits. In the spring the adult appear, that climb in trees and feed with flower buds and blossoms. It has a generation a year and winters as a larvae on the bark of the attacked branches. The fungus winters on the mummified fruits and in the bark of the attacked branches. The pulp of the fruits losses its texture and taste. Blackthorn dotty produced by the fungus Polystigma rubrum. This is a young tree its second year in our garden, but was three years old when it came. The spores assure the spread of the fungus and resists through the winter in the glue that leaks from the wounds. Eventually it leads to leaf deformity and death and can severely limit the tree's development. A gummy substance accumulates in the inner bark and erupts through cracks or lenticels in the bark. This form of attack is very dangerous, because dries the sprouts that has fruit buds. Plum Tree Bark Problem. The attacked plants are covered with their sweet droppings, that favors the appearance of some phytopathogenic fungus. Bacterial canker (or bacterial spot) is caused by the bacteria Psedomonas syringae, and produces brown areas on the trunk and branches of the affected tree. On the surface of the fruits appears a grey fluff, that represents the fructifications of the fungus. If the attack is severe the shield that protects the body of the insect overlap and suffocate the trees. Bacterial canker of stone fruits (Pseudomonas syringae pv morsprunorum). An EAB infected tree has a thin or dying crown and erratic growth along the trunk of the tree. This penetrate into the fruit through the peduncle area and eat irregular galleries around the stone. The attack produces fruit deformation and crack of the pulp. Your plum tree might be affected by Sooty Mould. Several types of viral diseases affect plums. During the vegetation period, treatments are applied in certain phenophases for the control of pests and diseases. It is a polyphagous species that attacks many fruit trees, vine etc. A powerful attack determine trees defoliation. Brown rot is caused by infection from Monilinia fungi. These are primarily fungal and bacterial in origin, although several viral pathogens also affect plums. The females and larvae spread on all the organs of the affected plant, including the fruit, this insect feeding with the cell juice of the host plant. Treatments with Decis Mega EW 50, Confidor Energy, Mospilan 20 SG, Actara 25 WG.

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