Cucumber dead tree disease retrieval
At present, the production of cucumber in greenhouses has been nearly completed. Diseases of dead trees in the production of cucumbers are increasing day by day. However, most farmers cannot identify which kind of pathogens caused the infection, which makes it impossible to achieve ideal control effects. To this end, the author specifically summarized the diseases of dead cucumbers for reference. Infected parts of the bacteria: root, stem base, grafting interface, stem junctions and so on. The diseases actually occurring in production include: Fusarium rot of root bark, Phytophthora root rot, Fusarium wilt, Blast disease, White peony disease, Sclerotinia, and Epidemic diseases. Root rot: Among them, root rot of Fusarium solani is the main root rot species of non-grafted cucumbers. Diagnostic features include decay of the basement of the underground stem and inconsistency of contracture; second, browning of the base tube of the stem; and thirdly, catheterization of the base of the stem. Turns brown, but does not develop upwards, ie the ducts of the shoots on the ground do not change color. Phytophthora root rot is the major root rot species of grafted cucumber. Fusarium Wilt Disease: Cucumber wilt disease, also known as scutellaria or wilt disease, is a worldwide disease that occurs in all parts of the province, especially in protected areas. Due to successive years of planting, the amount of bacteria in the soil has increased year by year, resulting in an increasing incidence of disease. serious. The diagnostic feature is that the diseased plant is wilting; when it is severe, the root and stem ducts are dissected and seen to turn yellow-brown or dark brown. Other diseases do not have this symptom. White leeches: The affected parts mainly occur at the base of the stems of plants. On the upper part of the disease, there are white mycelium-like mycelia. The mycelium is radiant and has obvious edges. It is called white tinea and it also produces brownish brown bacteria. nuclear. Blight: The diagnosis is characterized by softening and contracting of the stem base and wilting of plants, but the catheter does not change color, which is different from the wilt disease. The main difference between Fusarium wilt and cucumber blight is that cucumber wilt disease generally does not damage the leaves. Sometimes veins yellow and reticular. Damage to the leaves, began to be water-immersed, dark green spots, after the expansion of the near-round large lesions cucumber wilt disease does not harm melon strips, the disease damage melon strips, start water immersed depression, after shrinkage soft rot, surface White wilt; cucumber wilt disease was wilt, severe death, the disease was wilt, soon withered; cucumber blight disease above the base of the stem longitudinal cracks, blight of the underground stem base soft rot contraction, rot; catheter cucumber blight caused by the catheter Dark brown, the disease does not change color. Cucumber Mantle Blight: Apart from injuring cucumbers, Cucumber Mantle Blight also harms wax gourds, pumpkins, zucchini, melons and watermelons. Cucumber stems and leaves can be killed. The diagnosis points are: First, the leaves are large in lesions, semicircular or "V"-shaped, and there are many small black spots above the lesions; second, stem damage occurs in the joints, lesions are white, and there are amber adhesives. The mass flowed out, scattered a large number of small black spots, causing severe growth. Sclerotinia belongs to the disease of soil fax fungus, plastic sheds, greenhouses or open-air cucumbers can be the disease, but the weight of cucumber sheds in plastic sheds can be infected from the seedling stage to the adult stage. The main damage to fruits and vines.
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