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How to prevent and control pests and diseases of oleander? A detailed guide to practical methods
1. After aphids are found, spray the plants with a 40% dichlorvos emulsion at 800 times dilution, or with water in which cigarette butts have been soaked; when there are only a few, they can also be brushed off. For other control methods, refer to the pest and disease control section for Chinese rose and scarlet sage. 2. Scale insects damage the branches and leaves. Control method: spray the plants with Jiesha at 2000 times dilution. For other control methods, refer to pest and disease control for crape myrtle. 3. Black spot disease This disease occurs easily under high temperature and high humidity and damages the leaves. After it appears, spray with 50% carbendazim at 500 times dilution or thiophanate-methyl at 600 times dilution. For other control methods
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Control Methods for Several Diseases of Phalaenopsis
Anthracnose is severe under high temperature and high humidity, forming brown-black round spots that gradually expand outward. Spray evenly with Previcur 800 times solution, once every 5 days, for 2 to 3 consecutive sprays, to bring the disease under control. Soft rot symptoms are rot at the leaf base, rot of the pseudobulb, with a musty bacterial odor. Control method: spray agricultural streptomycin sulfate 4000 to 5000 times solution at the early stage of disease, once every 7 days, for a total of 2 to 3 sprays. Sclerotinia disease symptoms first appear at the leaf base, with light brown, water-soaked lesions that rot and can spread to the whole
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What causes vomiting in pigs? Common diseases and prevention and treatment methods
In production, the symptom of vomiting in pigs can often be seen. Sometimes we may think it is some common gastrointestinal disease, but we must pay attention to the possibility that it may be caused by certain infectious diseases. Below is a summary of the diseases that can cause vomiting in pigs. 1. Porcine transmissible gastroenteritis. Porcine transmissible gastroenteritis is a highly contagious viral infectious disease characterized by causing vomiting, severe diarrhea and high mortality in piglets under 2 weeks of age. Although pigs of different ages are all susceptible to this virus,
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Ten observation points for sick pigs, so pig farmers can quickly identify swine diseases
At present, for rural farmers raising pigs, in terms of feeding and management, some people pour feed into the pig trough and turn around and leave, rarely paying attention to observing the pigs' growth and development or whether they show signs of illness. As a result, they do not know when a pig gets sick, and by the time the pig is down in the pen, it is too late and difficult to treat. To prevent disease before it occurs and treat it early when it does, symptoms must be discovered in time. Observation can be made from the following ten aspects. 1. Look at demeanor. Healthy pigs are spirited, with tails raised and swinging freely, while sick pigs are listless, slow to move, prefer lying still, and have drooping tails.
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Pollution-Free Control Methods and Technical Key Points for Edible Mushroom Diseases
In the process of edible mushroom production, as long as management is carried out according to the biological characteristics of the selected mushroom strain, physiological diseases will not occur. When infectious diseases occur, pesticides must be applied in accordance with pollution-free requirements, with prevention as the priority, and never use pesticides casually. Long-stemmed mushrooms and unopened caps are typical symptoms of oxygen deficiency, especially when semi-underground mushroom sheds are used for cultivation. This phenomenon occurs commonly, severely reducing mushroom quality and affecting production efficiency. Solution: strengthen ventilation management. In low-temperature seasons, open the ventilation openings and door between 10 AM and 2 PM.
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What are the control methods for common physiological diseases of edible fungi?
1. Mycelial overgrowth After inoculation of edible fungi, vegetative growth is excessive, and the fluffy mycelium grows densely. After casing soil is applied, it often "drills" out of the ground and forms a mycelial mat. This situation is related to the characteristics of the strain and environmental conditions. Low water content in the soil layer, excessively high nitrogen content in the compost, poor ventilation, and excessively high air humidity all easily cause mycelial overgrowth, producing the phenomenon of "mycelium emergence." Common control methods: select high-quality strains; pry loose and break up the hardened mycelial mat; cover with fine soil, increase ventilation, and lower relative air humidity; use heavy watering to promote mycelial
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Forecast of Major Diseases and Pests of Edible Fungi (2006)
The edible fungi industry has been ranked among the six major industries of agriculture in China, with an annual output of over 12 million t, becoming a distinctive and pillar industry in agricultural regions. With the acceleration of industrialization, the cultivation area of edible fungi nationwide has continued to increase by 15% annually, among which the number of medium-temperature and high-temperature varieties has grown, the types of diseases and pests have increased, and the degree of damage has worsened. Through multi-point disease and pest surveys and information collection across the country, the occurrence status of diseases and pests in major edible fungi production areas nationwide in 2005 was summarized, and on this basis, a forecast for 2006
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Identification and Control Methods for Common Diseases of Edible Fungi
Brown rot, also known as white rot, wet bubble disease, etc. When diseased mushrooms are infected at a young stage, they cannot further differentiate and develop, and later form deformed mushrooms, often with a layer of "white fuzz" growing on the surface, which is the mycelium of the pathogen. When the temperature is above 20°C, over 4 to 5 days, the diseased mushrooms darken in color, then rot, exuding a brown (soy-sauce-like) liquid and becoming decayed and foul-smelling; below 20°C, this process takes longer. When the fruiting body is infected at the mid stage, brown lesions appear on the cap, the stipe becomes swollen and thick, and then the mushroom body softens. Cutting open the diseased mushroom reveals that its interior changes from white to grayish-white
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Identification and control methods for several common diseases of edible fungi
I. Causes of deformed mushrooms and measures to avoid them. Deformed mushrooms lower product grade and may even lose their commercial value, affecting the economic benefits of cultivation; this problem is widespread. Common deformed mushrooms include: caps tightly clasped and not opening, appearing "fist-shaped"; stipes long, thick and fleshy with small caps, appearing "vase-shaped"; caps sunken with cracked, outward-curling edges, appearing "broken-bowl-shaped"; caps narrow and long, appearing "ox-tongue-shaped"; caps with spots on the surface, appearing "pockmarked"; caps with swollen tumor-like protrusions in the center, appearing "belly-swollen"; two caps spreading side by side with stipes tightly joined, appearing "butterfly-shaped"; caps curved and uneven, appearing "wavy-edged"
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Common Pests and Diseases of Golden Privet and Their Control Methods
Content: We have a large area of golden privet (Ligustrum vicaryi). Every year in the hot, humid season, the leaves drop in patches until the plants turn yellow and wither. What is the cause, and how can it be controlled? Reply: It may be "golden privet leaf spot" caused by a fungus. Once the plum rain season ends, it spreads everywhere, and affected golden privet quickly loses all its leaves. It is generally caused by planting density being too high, and in recent years it has appeared in large numbers in Shanghai. Control: spray with a fungicidal pesticide.
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