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What are the control methods for deformed mushrooms?
Deformed mushrooms mainly occur when ventilation is poor and the carbon dioxide content in the mushroom house exceeds 0.3%. Mushrooms that emerge too deep, growing out of cracks in the coarse soil, are also often deformed. For preventive measures, focus on ventilation and air exchange in the mushroom house. Ground bud mushrooms: when the compost is brought into the mushroom house with excessive moisture, when the mushroom house is ventilated too long during watering of the coarse soil, when the fine soil is covered too late, or when the temperature is relatively low, ground bud mushrooms are likely to appear. For preventive measures, master proper watering amounts and timely ventilation so that the mycelium hangs above the clay and below the fine soil.
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Control Methods for the "Three Pests and One Disease" in Mushroom Cultivation
The "three pests and one disease" that harm autumn mushrooms are: mites, springtails, mushroom gnats, and harmful Mycogone perniciosa. The damage characteristics and control methods of these pests and diseases are described below. I. Mite damage symptoms: During the spawn-running process, if mycelial regression is observed, such as a decrease in fluffy mycelium and an increase in strand-like mycelium, and pinkish shiny spots are seen on the mycelial surface, then mite infestation has appeared on the mushroom bed. When 3-5 mites are present within the range visible under a magnifying glass, the control threshold has been reached. After casing soil is applied, mites will move along with the mycelium growing toward the soil surface and move with the soil surface, concentrating
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Symptoms and Control Methods of Potato Powdery Scab
[Pathogen scientific name] Spongospora subterranea (Wallr) Lagerh. [Host crops] Potato, black nightshade and Nicotiana rustica. [Disease diagnosis] It mainly affects underground tubers and roots, and above-ground stems can also be infected. When tubers are infected, pinhead-sized brown spots first appear on the epidermis, surrounded by a translucent halo, which then gradually expand and rise, forming rash-like "blister spots" 3 to 5 mm in diameter. In the early stage, the epidermis of the lesions does not rupture, which is the "closed blister" stage; as the disease progresses, a suberized halo forms at the boundary between diseased and healthy tissue, and then the epidermis ruptures and curls back, the tissue beneath turns orange-red, and a large amount of dark brown powdery material is released, the blister spots collapse to reveal cavities, forming crater-shaped powdery scabs, which is the "open blister" stage. On tubers that have already formed powdery scab, the ruptured epidermis can cause water loss during storage, or infection by other pathogens can lead to dry rot and shriveling. When roots are affected, tumors the size of a bean, single or clustered, grow on one side of the root; in severe cases, young plants wilt and die. When above-ground stems are infected, the lesion characteristics resemble those of affected tubers. The causal pathogen is Spongospora subterranea. The brown powdery material released from the blister spots of the diseased parts consists of the pathogen's resting spore balls. The spore balls vary in size and are formed by the aggregation of many nearly spherical yellow-brown resting spores, with hollow cavities inside, appearing like spongy spheres, and pore-like structures can be seen under the microscope. Individual resting spores are spherical to polygonal, with thin, smooth walls, and germinate to produce zoospores. The zoospores are nearly spherical, without a cell wall, bearing two flagella of unequal length at the apex, and later become motionless and form amoebae that invade the host root hairs.
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Occurrence and Control Methods of Carnation Viral Diseases in Protected Cultivation
Symptom Identification Carnation Vein Mottle Virus Disease When carnation is infected by Carnation vein mottle virus, it infects carnation, China pink (Dianthus chinensis) and American pink (Dianthus barbatus), all producing systemic mosaic, and in winter the old leaves often show symptom masking. Discolored spots appear on the petals, and the symptoms are especially obvious on red large-flowered cultivars. Carnation Latent Virus Disease After carnation is infected by this virus, it generally shows no symptoms, or has mild mosaic symptoms. But when Carnation latent virus and Carnation vein mottle virus infect together, mosaic symptoms are produced. Carnation
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Symptom Identification and Control Methods of Potato Blackleg
[Pathogen scientific name] Erwinia carotovora var. atroseptica (Van Hall) Dye. [Host crops] Many crops in the Solanaceae, Cucurbitaceae, Fabaceae, Apiaceae and other families. [Disease diagnosis] It can occur throughout the entire growth period, mainly damaging the root-stem area and tubers. When seed potatoes are heavily infected, sprouts rot before emergence, or emerged seedlings die quickly; in mild cases, symptoms appear successively when seedlings are 10-20 cm tall. Diseased plants are stunted, yellowed and dwarfed, and the cortex and
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Occurrence Patterns and Control Methods of Potato Blackleg
Symptoms Potato blackleg is a bacterial disease that infects vascular bundle tissue and can infect potato stems and tubers. It can occur from seed potato sprouting to the late growth stage, and is most prevalent at the seedling stage. Most diseased plants lose water and droop, the leaf color remains unchanged, the whole plant wilts, and the blackleg portion is mostly softened and rotted. The color of the diseased part is yellowish-brown, light brown, dark brown, or pale green. The vascular bundles inside the stem and the vascular bundles of the underground stem basically become discolored in a ring shape. The junction of the stem base and the mother tuber first turns black, then spreads toward the area near the soil surface, forming blackleg. When humidity is high, the blackleg can rise to 3.
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Control Methods for Rhizoctonia Stem Rot of Carnation
It mainly attacks the root crown area of the plant, and infected plants dry up and die quickly. The pathogen infects the root crown of seedlings near the soil surface, initially causing brown or dark brown spots that gradually spread to the surrounding area. The base of the seedling rots and constricts, causing lodging. When older seedlings at the stem base are affected, the cortex near the soil surface rots and becomes slimy. The leaves of diseased plants turn pale white, wilt and droop, and finally the whole plant dies. Control methods: (1) Before cuttings are taken, flower pots and soil must be disinfected. (2) Plants should be grown on raised beds, and watering should be controlled so that the potting soil does not become too wet. (3) Disinfection
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Pests and Control Methods for Cut-Flower Carnations
(1) Red spider mite: damage is severe under high temperatures above 25°C (July to August), with a small number of occurrences around mid-April. Control methods: remove dead branches, fallen leaves and weeds, improve cultivation conditions, and appropriately increase air humidity. At the initial stage of occurrence: spray 40% dicofol emulsifiable concentrate at 1000-1500 times dilution, or 40% dimethoate emulsifiable concentrate at 1500 times dilution, or 25% phosmet emulsifiable concentrate at 1000 times dilution, or fenvalerate at 800-1000 times dilution, or saomantjing, propargite, hexythiazox, pyridazinone, flufenoxuron, miechongling, etc.
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Symptom Identification and Control Methods of Carnation Rust
Rust is one of the common diseases of carnation, and susceptibility varies among cultivars. It generally occurs commonly in autumn and winter when control is neglected, and is severe in continuous cropping fields where the previous crop was heavily diseased. The whole plant can be affected, with leaves suffering the most severe damage. Reddish-brown spots appear on both the upper and lower surfaces of diseased leaves, and the epidermis around the diseased area ruptures, exposing red powdery material, which is the uredinium of the pathogen. In the later stage, the color of the diseased area deepens, and after the epidermis ruptures, dark brown to black powdery material appears, which is the telium of the pathogen. Rust can also damage the stems and sepals of carnation. Carnation rust is caused by the fungus Uromyces dianthi, and is a
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What are the control methods for Fusarium wilt of carnation?
1. Symptoms: The infected parts turn yellowish-brown or brown with dry rot, spreading rapidly upward; the stem shrinks, and a cross-section of the xylem shows yellowish-brown or purplish-brown decay. The leaves on the aboveground part of the diseased plant lose their luster and become soft, and the leaves near the root crown first turn yellow and droop. The disease develops rapidly, and the plant quickly wilts; if the pathogen invades from one side of the plant, only half the plant wilts first. When the environment is humid, colored filamentous structures can be seen at the rotted root crown area; these are the fruiting bodies of the pathogen. 2. Pathogen: Fusarium dianth
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