-
Causes and Prevention and Treatment Methods of Sudden Death Syndrome in Cattle
Sudden death syndrome in cattle is a new disease that has occurred commonly throughout China in recent years and has attracted much attention. It is characterized by sudden onset, unnoticeable symptoms, and rapid death; cattle often die before treatment can be given. It causes relatively great harm to the cattle industry. (I) Causes Regarding the cause of this disease, there have been many research reports in recent years, with opinions varying widely and no definitive conclusion yet; they can be summarized as follows: 1. Cattle accidentally eat forage or feed contaminated with fluoroacetamide. 2. Cattle are infected with Clostridium welchii type A, causing this disease, or this bacterium is mixed with Bacillus [text unclear],
-
Cause Analysis and Diagnosis and Treatment Methods for Mycelial Regression in Oyster Mushrooms
In the autumn and winter seasons of last year, mycelial regression occurred frequently in oyster mushroom production, and there were also sporadic cases this spring and summer. The symptoms of mycelial regression are as follows: the spawn blocks germinate normally, the colonization of the substrate is slower than normal, and growth from the spawn blocks is radial. When the mycelium length reaches 4-5 cm, the mycelium gradually becomes sparser starting from the spawn block, while the mycelium at the growing tips is denser and denser white and continues to develop, with the mycelium behind it fading and thinning accordingly, until finally the surface of the entire mushroom bag appears slightly grayish-white or even devoid of mycelium. At 40 days after inoculation, the mushroom bags appear grayish-white rather than the normal pure white, and no
-
What to Do When the Surface of Oyster Mushroom Substrate Turns Black? Cause Analysis and Control Methods
The main causes of blackening on the substrate surface and the control methods are: (1) Oyster mushroom mycelium soaked in water for a long time causes rot and blackening. In this case, the condensation water on the substrate surface should be absorbed and dried promptly. If it is grown on beds, excess water at the bottom should also be absorbed and dried promptly. (2) Contamination by foreign microorganisms and breeding of insect pests cause blackening. When blackening occurs, pests must be controlled or the affected part dug out promptly to prevent it from spreading.
-
Causes and Control Methods of Yellow Mushroom Disease in Oyster Mushrooms
In recent years, the cultivated area of oyster mushrooms has continued to increase, but due to poor management by growers, weak awareness of disease prevention, and other reasons, the incidence of yellow mushroom disease in oyster mushrooms has shown an upward trend year by year. In some mushroom sheds, after one flush of mushrooms, no more mushrooms appear for a long time; in others, the small mushrooms that do appear turn yellow before growing up, then shrivel and die, leading to a decline in oyster mushroom quality and making it difficult to increase yield. For this reason, the author studied the causes of the disease and integrated control techniques, and reports as follows: 1. Disease symptoms. Yellow mushroom disease mostly starts from the caps of young mushrooms or the junction between the stipe and cap of small mushrooms. After onset, pale yellow spots appear on the caps of young mushrooms or in the depressions of the caps of small mushrooms. The young mushroom bodies become sticky, stop growing, and die; small mushroom bodies grow slowly and lose elasticity, breaking apart at the slightest touch, after which the mushroom bodies become sticky and shrivel, giving off a foul rotting odor. The disease spreads rapidly, causing the cultivation substrate surface to become sticky and cease producing mushrooms.
-
Causes and Control Methods of Deformed Oyster Mushrooms
Deformed mushrooms are a relatively common physiological disorder in oyster mushroom production, severely affecting the yield and quality of oyster mushrooms, and even causing them to completely lose their commercial value. This disorder is mainly caused by improper management, and in a few cases by strain degeneration, mutation, or viral infection. The main types of deformed mushrooms are: 1. Tall-stemmed mushroom: the cap is small, differentiation is poor, and the stem is relatively long. The cause is that during the primordium formation and differentiation stage, the mushroom house is short of oxygen, light is insufficient, and the temperature is relatively high, which affects the normal differentiation and development of the cap. Control methods: strengthen ventilation, adjust light and temperature
-
Lily Cultivation Techniques: Open Field, Greenhouse, Pot and Cut Flower Growing Methods
The lily is a cold-hardy bulbous flower of the Liliaceae family that loves light and fertile sandy soil. It has unusual flower shapes and many bright, beautiful colors, and works both as a potted plant and a cut flower, giving a sense of wealth and elegance, and it is very appealing; it can be planted year-round, produces a large quantity of flowers, and has high economic returns, so in recent years its cultivation has developed quickly; but beginners often see poor growth, few flowers and disease; for this reason, the author, based on cultivation practice, briefly describes the following lily open field, greenhouse, pot and cut flower cultivation techniques. 1. Planting Methods and Time Regardless of whether lilies are planted in the open field or in a greenhouse, fertile, well-aerated sand
-
What causes stunted cotton seedlings? A detailed explanation of prevention and control methods
During the transplanting period, cotton is often affected by abnormal weather, weak seedlings, inadequate cultivation measures and other factors, which cause a long slow-seedling period and stunted growth after transplanting, delaying the cotton's growth process and reducing cotton yield. The causes of stunted cotton seedlings and their prevention and control are described below: 1. Causes. 1. Poor cotton seedling quality. ① Insufficient fertilization of the seedbed produces small, weak seedlings with poor growth vigor that establish slowly. ② Improper seedbed management produces leggy seedlings or overgrown seedlings, which lose too much water after transplanting and suffer severe transplanting injury. 2. Unsuitable temperature. In many places
-
Causes of soft rot and nest rot in Gastrodia elata and prevention methods
Soft rot and nest rot in Gastrodia elata is one of the reasons for low and unstable yields in Gastrodia elata cultivation. In the small tubers, white tubers and arrow tubers affected by soft rot, the tuber skin turns yellow and withered, the central tissue decays, and a foul-smelling white milky fluid oozes from the cut surface of the tuber. In the rotting nests of Gastrodia elata and inside the tubers, the rhizomorphs of Armillaria mellea are luxuriant and dense. Gastrodia elata depends on Armillaria mellea for growth, so why does soft rot and nest rot occur, and why is the area beneath the tuber skin filled with Armillaria mellea mycelium? To explore this question, we should start with the nutritional ecology of Gastrodia elata. Gastrodia elata has no roots and no green leaves, its autotrophic organs are degenerated, and it relies on Armillaria mellea
-
Causes of Gastrodia elata trait degeneration and control methods
Degeneration of Gastrodia elata traits usually manifests as a decline in the yield of arrow gastrodia, with the individuals becoming smaller and slender; the yields of rice gastrodia and white gastrodia drop substantially, the tubers turn ginger-yellow or light brown, stress resistance is poor, and the original yield and traits cannot be fully expressed. The causes are generally as follows: 1. Multiple generations of asexual propagation. Degeneration generally begins to appear after 5 to 6 generations of asexual propagation, but the speed of degeneration differs when cultivated on different soils; degeneration is slower when cultivated on granite soil, followed by yellow-brown earth sandy soil parent material, and the acidic soil formed by the weathering of shale or limestone.
-
What are the commonly used processing methods for Gastrodia elata?
The processing of Gastrodia elata must be done carefully and meticulously; otherwise, the good Gastrodia elata that was cultivated through hard work will be processed into inferior products, and all the effort will be wasted, failing to achieve good economic returns. There are 3 commonly used methods for processing Gastrodia elata: 1) Basket steaming method: the method of steaming Gastrodia elata in a basket is called the basket steaming method. Gastrodia elata processed by this method has bright color and the best quality. That is, wash the Gastrodia elata clean of surface soil with clean water, divide it into large, medium and small grades, place them separately in a ground basket and steam for 10-20 minutes; the small ones should be steamed for a shorter time, and the large ones slightly longer, with the degree of being steamed through and having no white core as the standard. 2) Rice-washing water boiling method: use 5
条件筛选