Privet leaf rust
Privet, also known as holly, wax bug tree, small evergreen tree, originated in China and Japan. Like light, slightly resistant to shade, like warm and humid, suitable for slightly alkaline soil, slightly resistant to cold, strong resistance to air pollution. Ligustrum lucidum is a commonly used green tree species in courtyard, which can be used as hedge and courtyard greening tree species.
Symptoms: round brown disease spots appear on the surface of the susceptible leaves, and gradually sunken, and the corresponding parts of the back of the leaves are raised. The mesophyll of the diseased part is thickened, yellow or purplish red, and many cup-shaped spores are produced on the raised lesion. The spores also occurred on the petiole, and the susceptible petiole was slightly enlarged. When the disease is serious, the leaves are deformed and die.
Pathogen: the pathogen is Ligustrum lucidum (AecidiumklufAistianumDiet.), which belongs to basidiomycetes subphylum, Alternaria and Rust Fungi.
Incidence regularity: the disease harms all kinds of privet, and the peak period of the disease is from April to June.
Prevention and treatment: ① removes fallen leaves at any time and burns them centrally. ② was sprayed with 1 Bordeaux solution (1) and 1 Bordeaux (200).
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Privet genus
Latin name: LigustrumL. English name: Privet introduction: evergreen, semi-evergreen or deciduous, trees or shrubs. Leaves simple opposite, entire, petiolate. Cymose panicles terminal and axillary. Flowers bisexual; Calyx bell-shaped, 4-toothed, irregularly cleft or truncate; Corolla white, subradiate, funnel-shaped or salverform, Corolla tube longer than lobes or subequal, lobes 4, valvate in buds; stamens 2, inserted near Corolla tube throat, enclosed or protruding, locule nearly extroverted.
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The pathogen of privet leaf spot disease?
The pathogen of Ligustrum lucidum leaf spot disease is: Ligustrum lucidum leaf spot mold, which belongs to the subphylum fungus. The conidium is born on the leaf surface, initially buried, scattered or aggregated, and then exposed through the epidermis, showing a convex mirror, with a size of 72 to 88 microns. The conidia are nearly rectangular, colorless and contain 2 oil globules, 5 to 7 times 2.5 to 3 microns.
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