Cherry flow gum disease is frequent in spring

Cherry tree gum disease usually begins when the sap flows in the spring, which mainly damages the cherry trunk and the main branch. According to their symptoms are divided into dry rot and ulcer type flow plastic two. Dry rot mostly occurs on the trunk and main branch. The initial lesions are irregular, dark brown, and the surface is hard. It often causes flow of glue. The late lesions are long strips, shrinking depressions, and sometimes the surrounding cracks, the surface of dense black point. In ulcerative gyropathies, the diseased part of the tree has a resin, but it does not flow out immediately but remains between the xylem and the phloem. The diseased part is slightly uplifted, and flows out from the cutaneous hole or wound of the diseased part as the sap flows. The disease department was initially colorless, slightly transparent or dark brown and hard.

There are many reasons for the occurrence of cherry cast gum disease, which is mainly caused by the invasion of pathogenic bacteria and the imbalance of their own nutritional metabolism.

Temperature and Humidity: The severity of fluid injection has a close relationship with temperature and humidity. In the spring, with the increase of temperature and the onset of the rainy season, the onset of the disease occurs. The condition is becoming more and more severe, and the incidence is heavier during the rainfall period, especially in continuous rain. In the weather, the disease department leaked a lot of glue, and as the temperature decreased and the rainfall decreased, the disease progressed slowly and gradually reduced and stopped.

Soil conditions: The soil nutrient conditions in the orchard are closely related to the occurrence of plastic gum disease. Orchards with loose soil, high organic matter content, well-drained water, and balanced nutrients rarely cause fluid plastic disease; for example, soil nutrient imbalance, soil viscosity, and air permeability Poor orchard, higher incidence.

Rootstocks and varieties: Different rootstocks have important effects on cherry branches, roots, and fruit set. Daejeon's investigation showed that the branches grafted by the leaves of Folium were easy to prosper, their roots were poor, and they were susceptible to disease; the cherry of the zy-1 root had a moderate growth, a moderate tree vigor and a milder disease.

Tree wounds: The wounds caused by the damage of the branches, such as Giardia, Red-necked longhorned beetle and Morinda citrifolia, are one of the most important causes of fluidic diseases; frost, cold damage, sunburn, and mechanical damage are also pathogenic bacteria. The intrusion created a convenient condition and aggravated the occurrence of turbid fluid.

Root diseases: If the roots of large cherry roots have root cancer, root rot, root rot, or roots that are weak due to water, they are prone to gummy disease. Causes the tree's physiological metabolism ability to reduce, the disease resistance is weak, the tree susceptibility disease organization increases, the invasion opportunity of the pathogenic bacteria is numerous, the fluid glue disease occurs seriously.

Cultivation and management conditions: excessive trimming during overgrowth and re-pruning, excessive fruiting, inadequate or unbalanced fertilization, resulting in soil compaction, poor air permeability in the rhizosphere; excessive watering of the orchard, resulting in water in the tree plate, poor root respiration, Affecting the growth and development of cherry trees, trees are susceptible to disease, and the incidence is heavy.

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