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What are the main pests and diseases of daffodils? How are they controlled?
The main pests and diseases include large brown spot disease (leaf spot disease), bulb rot, nematode disease, the narcissus fly, and the bulb mite (Rhizoglyphus echinopus), among others. The control methods are as follows: (1) For large brown spot disease, from March to May, spray once every 10 days with a 700x dilution of 75% chlorothalonil wettable powder, or a 100x dilution of equal-amount Bordeaux mixture
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Gladiolus got leaf spot disease? Detailed control methods
Symptoms: Leaf spots are reddish-brown, with darker edges and lighter centers, nearly round, 1-5 mm; the spots may merge into large patches, and in severe cases the spots cover the entire leaf, causing the leaves to wither early. Pathogen: Cercospora sp., a Cercospora fungus. Conidiophores are light brown, nearly colorless at the tip, septate
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Anthracnose Control in Hyacinths and Common Plant Diseases and Integrated Pest and Disease Management
[Symptoms] It causes leaf tips to die back or produces large brown spots on leaf surfaces and petals. It mainly damages leaves and flower stalks. When leaves are infected, the lesions mostly occur on the underside of the leaves, initially appearing as brown round spots with indistinct edges, expanding outward in concentric rings, with purplish-brown edges and a light brown center; in the later stages, small black dots appear on the diseased areas
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What are the control methods for sclerotium disease in hyacinths?
[Symptoms] It affects leaves and bulbs and is a common disease of hyacinths. Infected plants are stunted and slow to develop. The leaves of diseased plants are grayish yellow; as the disease progresses, the leaves gradually wither and detach very easily from the bulb; the interior of affected bulbs becomes discolored and rots to varying degrees, with white mycelium forming inside
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Identification and Control Methods for Common Pests and Diseases of Cymbidium Orchids
The common diseases of Cymbidium orchids mainly include phytophthora disease, soft rot, root rot, anthracnose, leaf blight, sooty mold, and viral disease; the main pests include scale insects and snails. (1) Control of phytophthora disease. Spray with a 500-fold solution of 80% zineb.
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What are the common pest and disease symptoms of Cymbidium orchids?
Because of differences in the parts affected and the symptoms produced, blight is divided into black rot, heart rot, stem rot, damping-off and so on. Under conditions of high cultivation temperature, overwatering and poor ventilation, a large amount of water accumulates in the leaf tips, and over time this most easily triggers the disease. June to August each year is the peak period for its occurrence
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How to prevent and control banana leaf spot disease? A detailed explanation of practical technical points
Control techniques for banana leaf spot disease
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What are the control methods for sunscald disease in Alocasia macrorrhiza?
It occurs everywhere, and the leaves, flowers, stems and fruits of many woody and herbaceous flowers can be affected, hindering their ornamental value. Symptoms: In summer, when plants are exposed to intense sunlight, water-soaked spots appear on the leaf surface, which then rapidly lose water and turn grayish-white. Disease pattern: The longer a plant grows in the shade, the more tender its tissues become; the higher the temperature in sunlight and the longer the exposure, the more severe the disease.
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Common Physiological Diseases in Carnation Cultivation and Their Prevention Methods
The main physiological diseases in carnation cultivation include split calyx, bent flower heads and albino leaves. The first two in particular can significantly reduce cut flower quality. (1) Split calyx. Large-flowered varieties are more prone to split calyx than medium-flowered varieties, sometimes with more than 50% of flowers affected
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Propagation Methods and Pest and Disease Control Techniques for Lysimachia nummularia
Propagation Methods and Pest and Disease Control Methods for Lysimachia nummularia
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