Also, they will weave some kind of nest, inside of which they eat. The fungus attacks the young fruits too. The fungus winters as a mycelium on the bark of the trees. Also, they can attack the leaves, producing deformations and their fall. Crown gall produced by Agrobacterium radiobacter pv. This disease is not dangerous, but in the dry and hot years can affect the sensitive years.The attack appears on the leaves of young sprouts through the appearance of some white spots. Bladder plum gall produced by Taphrina pruni. Can you verify if these white splotches can be removed? Brown rot is caused by infection from Monilinia fungi. The tissue in the right of the spots thickens, become crispy and are swollen to the lower side. It is difficult to tell from the description, so it is recommended to apply an insecticide such as Karate Zeon, then alternate with an acaricide such as Nissorun after 7-10 days. Finally the attacked leaves fall, producing premature defoliation of the trees. There can be several causes: the attack of some pests, certain diseases, alternation of cold/sunny days during winter (depending on the area). Did you fertilize it? If the attack is strong, the photosynthesis capacity is reduced and the yield too. On the fruits it can be observed some dot-like formations, surrounded by a red-lilac border. Control of sooty molds begins with managing the insect creating the honeydew. Spatial isolation between the orchards cultivated with stone fruit trees; Destruction of the weed and shrubs close to the orchard; Usage of insecticides to control the population of insects. These illnesses, produced by Phytophtora, are usually caused by improper watering. Treating the insects will remove the source of the honeydew and dry up the sooty mould, which will eventually fall or wash off the foliage. On the surface of the fruits appears a grey fluff, that represents the fructifications of the fungus. 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. During the vegetation period, treatments are applied in certain phenophases for the control of pests and diseases. Elimination of the branches where the larvae are presented; Treatments with Karate Zeon 50 CS, Fastac Active, Laser 240 SC, Calypso 480 SC, Affirm. On the fruits are presented small, red-brown spots. The pulp of the fruits losses its texture and taste. Trees with freeze damage … You should apply 2-3 treatments with different products, after the flowers began to fall. On the upper side of the limb will appear yellow spots. These are primarily fungal and bacterial in origin, although several viral pathogens also affect plums. It is often a popular site for woodpecker feeding as the bird is harvesting the beetles in the bark. The mites are insects that hardly can be seen with the open eye. On the leaves appear some circular, yellow spots, that evolve and become orange and finally red. The attacked fruit will fall from the tree before its time. In Jacksonville, Fla., Frank Whittemore is a content strategist with over a decade of experience as a hospital corpsman in the U.S. Navy and a licensed paramedic. Coated leaves also might prematurely age (senesce) and die, causing premature leaf drop. So, the leaves will have a pierced look. They feed with the cell juice. It had a few but perfect fruit last year. Treatments with Actara, Reldan 22 EC, Laser 240 SC, Affirm, Kaiso Sorbie. Some are turning brown. On the leaves appears circular spots in whose right the tissue brunifies, and finally it breaks away from the rest of the leaf. Treatments with Laser 240 SC, Karate Zeon 50 CS, Faster 10 CE, Affirm, Decis Mega EW 50. Also, fertilize and water to keep plants healthy but not excessively vigorous. Plum trees can be affected by a variety of diseases common to stone fruit. Blackthorn dotty produced by the fungus Polystigma rubrum. Treatments with Decis Mega, Reldan, Fastac, Actara 25 WG, Calypso 480 SC. It has 3-4 generations a year and winters in the superficial layer of the soil. This are covered by a white mycelium felt. Black knot fungus ( Apiosporina morbosa) is primarily a disease of plum and cherry trees, although it can also infest other stone fruit, such as apricots and peaches, as well as ornamental Prunus species. The plum produces fruits after 4-5 years from planting, and its longevity is about 30-40 years. Treatments with Nissorum 10 WP, Envidor 240 SC, Milbeknock EC, Vertimec 1.8 EC. After the attack, the fruits are deformed, and the shell of the stone is destroyed.
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