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The Harm and Control Methods of Angelica Leaf Spot Disease
The pathogen of Angelica leaf spot disease (Septoria SP.) is a fungus of the genus Septoria in the subphylum Deuteromycotina. The pycnidia are round, and the conidia are filiform to needle-shaped, colorless and transparent, straight or slightly curved, mostly with slightly pointed tips, with 1-3 septa. 1. Harmful symptoms: it damages the leaves. In the early stage of the disease, brown spots appear on the leaf surface, and the lesions gradually expand, with a chlorotic halo appearing around them, the edges appearing reddish-brown, and the center grayish-white. In the later stage, small black particles appear within the lesions. When the disease is severe, most of the leaf becomes reddish-brown, and finally gradually withers
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A Detailed Explanation of the Harm and Control Methods of Angelica Sclerotinia Rot
The pathogen of Angelica sclerotinia rot (Sclerotinia SP) is a fungus of the genus Sclerotinia in the subphylum Ascomycotina. The sclerotia are borne on the plant surface or on aerial hyphae in the internal cavities of plant organs, resembling mouse droppings, irregular in shape, and composed of hyphae. 1. Harmful symptoms: It mainly harms roots and leaves. In the early stage of the disease, the leaves turn yellow; in the later stage, the plant wilts, and the root tissue rots to form cavities containing multiple black, mouse-dropping-shaped sclerotia. 2. Disease occurrence pattern: The pathogen overwinters as sclerotia in seeds, diseased seedlings, diseased residues, or soil, and in 1
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What are the control methods for premature bolting in Angelica sinensis?
Based on the causes of premature bolting in Angelica sinensis, targeted measures can be taken to control it. The main measures are: starting from phase development, which is the primary condition for controlling qualitative phase changes. Starting from phase development, as long as the normal progress of qualitative change at either the vernalization stage or the photoperiod stage is controlled, premature bolting can be prevented. In production, controlling the vernalization stage is far easier than controlling the photoperiod stage. Since the vernalization stage can be controlled during winter seedling storage, when seedlings are relatively concentrated, it is convenient to carry out. That is, during seedling storage, first sterilize, control storage humidity at 6
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Control Methods for Malformed Mushrooms in Off-Season Cultivation of Shiitake
In off-season cultivation of shiitake (Lentinula edodes), malformed mushrooms often occur because production conditions are not properly regulated, affecting the commercial quality and value of the mushrooms and greatly reducing production efficiency. The main manifestations of malformed mushrooms and their control measures are: 1. Small and thin caps. This manifests as caps that are both thin and small; even after a long growth period they cannot grow larger, and when eaten fresh they lack the distinctive aroma of shiitake. Control method: for bags that have not undergone color change, conditions must be regulated to induce color change; if the substrate nutrients are insufficient, they can be appropriately supplemented when soaking the bags, and
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Four Disease Prevention and Control Methods for Off-Season Shiitake Mushrooms
For off-season cultivation of shiitake mushrooms, during the high-temperature, high-humidity season from June to September, there are more diseases and contaminant fungi than in winter, but as long as prevention and control measures are appropriate, ideal production results can still be achieved. Log rot disease: in production, Trichoderma (green mold) usually infects first, then forms cross-infection with multiple fungi. Prevention and control measures: strictly and standardly carry out inoculation operations, and do not let mold spores fall into the substrate. Edible mushroom inoculation purification machines are worth promoting; when inoculating, turn on the purification machine for 5 minutes before operating. The effect is similar to conventional formaldehyde fumigation, and it avoids the possibility of formaldehyde residue and irritation to the human body.
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Causes of Deformed Mushrooms in Agaricus bisporus and Their Prevention and Control Methods
1. Deformed mushrooms. When ventilation is poor and the carbon dioxide content in the mushroom house exceeds 0.3%, deformed mushrooms are likely to appear. If the fruiting position is too deep, mushrooms growing between the cracks of the coarse soil also tend to be deformed. The key to prevention and control is to pay attention to ventilation and air exchange in the mushroom house. 2. Red root mushrooms. Slightly acidic cultivation material, a high-temperature stage before fruiting, excessive water content in the casing soil layer, excessive application of glucose as a supplemental fertilizer, and poor ventilation in the mushroom house can all easily lead to red root mushrooms. The pH of the compost should be properly adjusted, the water content of the casing soil should be maintained at 22%-25%, watering should be avoided during high temperatures, and the concentration of supplemental fertilizer should be appropriate.
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Symptoms and control methods of tulip southern blight
Symptoms: The whole plant wilts, with white mycelial strands or rapeseed-like tan-brown small sclerotia wrapped around the stem base, and the affected parts turn brown, rot and decay. Large amounts of white mycelial strands and tan-brown fungal bodies are visible on the soil surface. Pathogen: Sclerotium rolfsii Sacc., called southern blight, belongs to the Deuteromycotina fungi. The hyphae are white and silky, spreading in a fan-like or radial pattern, then gathering into mycelial strands or tangling into sclerotia. The sclerotia resemble rapeseeds, initially white to yellowish-white, later turning tan-brown, round, with a smooth surface. In addition, it has been reported that Corticium rolfsii
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Occurrence of Tulip Diseases and Integrated Control Methods
Tulip is a perennial bulbous herbaceous plant of the genus Tulipa in the family Liliaceae, also known as foreign lotus, grass musk, peony lily, etc., and is one of the most popular cut flowers in the world. With the adjustment of industrial structure, many places in Jiangsu Province have formed tulip fresh cut flower bases. However, in the production process, we found that every stage may be harmed by fungal, bacterial and viral diseases, thereby affecting the normal growth of plants, reducing the quality and ornamental value of cut flowers, and in severe cases causing devastating damage. Therefore, preventing the occurrence and development of tulip diseases is the
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Symptom Identification and Control Methods of Crown Gall Disease in Cherry Blossoms
Cherry blossoms are distributed in China's Liaoning, Hebei, Anhui, Jiangxi, Zhejiang, Jiangsu and Guizhou; they are also widely distributed in Japan and Korea. They prefer light and deep, fertile, well-drained soil, and have weak resistance to smoke and dust, harmful gases and sea breeze. They have a certain degree of cold tolerance, a relatively shallow root system, and are easy to cultivate. Cherry blossoms bloom profusely in spring and are very beautiful. They are suitable for planting on hillsides, in courtyards, in front of buildings and beside garden paths. This disease is a common and serious disease of cherry blossoms, occurring widely in areas where cherry blossoms have been introduced. Zhengzhou, Chengdu, Hangzhou, Jinan, Wu
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Control methods for stem-boring pests damaging cherry blossoms
The stem-boring pests that damage cherry blossoms include longhorn beetles and the coffee wood moth (Zeuzera coffeeae). Their control methods are: 1. Longhorn beetles. The longhorn beetles that damage cherry blossoms usually include the citrus longhorn beetle (Anoplophora chinensis), the glossy green longhorn beetle (Anoplophora glabripennis), and the peach red-necked longhorn beetle (Aromia bungii). ① Citrus longhorn beetle. One generation occurs per year. When adults emerge from late May to early June, capture the adults: before laying eggs, the citrus longhorn beetle adult first bites a notch about 2 mm deep and about 8 mm long in the bark in the shape of the Chinese character "eight" or "ding", then lays eggs inside it. During the peak egg-laying period in mid-to-late July, search for the notches on the trunk and crush the eggs.
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