-
Three Cases of Diagnosis and Treatment of Fox Diseases
1 Diagnosis and Treatment of a Case of Fox Hemorrhagic Pneumonia 1.1 Case In June 2003, a keeper from the fox farm attached to Gansu Normal University brought an adult silver fox for treatment. 1.2 Symptoms The affected fox was in a semi-comatose state, spitting pink frothy blood, with rapid breathing, the chest heaving sharply with each breath, limbs kicking about, unable to stand after lying down, T40.7°C, auscultation revealed a rapid heartbeat, and the breath sounds were harsh like a bellows. The keeper reported that everything was normal in the morning, and the disease came on suddenly in the afternoon. 1.3
-
Symptoms Identification and Control Methods of Phalaenopsis Sunken Spot Disease
Main symptoms: When this disease first occurs, spots appear on the leaf surface
-
The Harm and Prevention and Control Methods of Orchid Virus Diseases
Viruses are relatively primitive organisms. They have no cellular structure and can only replicate by parasitizing host cells. Once infected, there is generally no specific drug for treatment, so viral diseases can only be prevented. Prevention can be achieved by improving environmental sanitation and raising cultivation techniques. More than 20 kinds of viruses that can infect orchids have been discovered so far. The more common ones include Cymbidium mosaic virus (CyMV), Cucumber mosaic virus (CMV), Dendrobium mosaic virus (DeMV), Cymbidium ringspot virus (CyRV), and others.
-
What is anthracnose in Chinese orchids? Let us learn about this disease
Anthracnose in Chinese orchids affects orchids of the genus Cymbidium such as Spring Orchid (Cymbidium goeringii), Faber's Cymbidium (Cymbidium faberi), Four-season Orchid (Cymbidium ensifolium), Chinese Cymbidium (Cymbidium sinense), and Cold Orchid (Cymbidium kanran), causing scorched black spots on leaves and fruits, and in severe cases the entire leaf dies. Symptoms: In the early stage of the disease, round or oval red-brown spots appear in the middle of the leaf, and semicircular ones at the leaf margin. When they occur at the leaf base, large spots or a large number of them can also cause the entire leaf to die. In the later stage, the center of the spot becomes lighter in color, and the upper ring splits longitudinally. Spots on fruits are irregular, appearing as elongated dark brown patches. Pathogen: The disease is caused by several species of fungi. According to isolation and culture by the Shanghai Institute of Landscape Science,
-
Introduction to Brown Spot Disease of Southern Magnolia
Symptoms: The pathogen mainly infects the leaves. On the surface of diseased leaves, small light brown or yellow spots first appear, then expand into round or irregular lesions, 5-12 mm in diameter, with dark brown edges and grayish-white centers, on which many small black dots are borne. Adjacent lesions may merge with each other into irregular large necrotic areas. The disease generally begins in summer, and damage is more severe in August-September. Pathogen and current disease status: Southern magnolia brown spot disease, also known as leaf spot disease, is a common disease of southern magnolia. It occurs in all regions of China where southern magnolia is cultivated, with more severe occurrence in Suzhou, Nanjing, Wuhan,
-
Symptoms and Control Methods of Red Pine Bark Rot and Resin Flow Disease
[Distribution and Damage] This disease occurs in red pine (Pinuskoraiensis) plantations throughout the three northeastern provinces. In the Yanbian area of Jilin Province, the cities (counties) of Yanji, Hunchun, Helong, Wangqing, Dunhua, Antu, Longjing and others have relatively severe incidence, with a general incidence rate of 20%-30%, severely affected stands at 50%-60%, and in individual stands at the Mao'ershan Forest Farm in Yanji City, the incidence rate reaches as high as 98.6%. The pathogen attacks the phloem and cambium of the trunk and lateral branches of young red pines, even penetrating deep into the surface xylem of the sapwood, causing the tissue to rot and die with a brown discoloration
-
Detailed Guide to the Prevention and Control of Firmiana Pests and Diseases
The methods for preventing and controlling Firmiana pests and diseases are: 1. Remove and burn the diseased fallen leaves, and spray Bordeaux mixture or chlorothalonil and other chemicals during the disease outbreak period. 2. Spray soap-petroleum emulsion in early spring to kill the Firmiana psyllid. 3. Manually capture and kill the longhorn beetle adults, and inject fenitrothion and dichlorvos into the tunnels. 4. For other pests, spray any one of the chemicals dimethoate, dichlorvos, or trichlorfon during the nymph or larval stage.
-
Symptoms and Control Methods of Brown Spot Disease in Edible Fungi
Damaged crops: Edible fungi. Damage symptoms: Does not infect the mycelium, only infects the fruiting bodies, but can grow along mycelial strands, forming relatively dry grayish-white tissue masses. Infected mushroom buds stop differentiating; after young mushrooms are infected, the caps become smaller, the stems become thicker and brown, forming deformed mushrooms; after the fruiting bodies are infected in the middle to late stages, many pinhead-sized, irregular brown spots appear on the caps and gradually expand into grayish-white depressions. Diseased mushrooms often have their surface layer peeling or cracking, do not rot, and have no foul odor. The disease course is about 14 days. Classification attribute: Verticillium
-
Emergency measures for pests and diseases in edible mushroom production
In the winter of 2007, infectious diseases, physiological diseases and insect pests of edible mushrooms occurred severely. The affected varieties also spread from oyster mushroom, shiitake, button mushroom, willow mushroom and shaggy ink cap to white ferula mushroom, king oyster mushroom, tea tree mushroom, enoki mushroom, etc. After brief classification and arrangement, the author summarized the main pests and diseases and their treatment measures, hoping to be helpful to cultivation. Infectious diseases Yellow mushroom: mostly occurs on varieties such as oyster mushroom, white ferula mushroom, king oyster mushroom and willow mushroom. It manifests as the caps of young mushrooms turning yellow, gradually expanding, until the mature mushroom stage, when the color becomes more intense, and in some cases slightly lighter, with the yellow
-
Control Methods for Four Types of Diseases in Edible Fungi
1. Brown rot, also known as bubble disease, wet bubble disease, etc. It mainly affects button mushrooms, straw mushrooms, oyster mushrooms, etc. The disease is caused by a fungus called Mycogone perniciosa. The main characteristics are: the conidia and chlamydospores of Mycogone perniciosa only infect the fruiting bodies, not the mycelium. When the fruiting body is lightly infected, the stipe swells into a bubbly deformity, hence the name wet bubble disease. However, at different stages of fruiting body development, the symptoms also differ. When the fruiting body is infected before differentiation, an irregular mass of tissue resembling a hard-skinned puffball appears, covered with a layer of white cottony mycelium, and gradually
条件筛选