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Identification and Control Methods of the Pryeria sinica Moth on Japanese Euonymus
Scientific name: Pryeria sinica Moore. Morphological characteristics: The adult moth has a body length of about 12 mm and a wingspan of about 30 mm. The head, thorax and antennae are dark brown. The male moth's antennae are feathery, while the female's are pectinate. There are long orange-yellow hairs on the thorax dorsum and both sides of the abdomen. The forewings are semi-transparent, but the basal 1/3 of the wing is yellow, the rest is dark gray, and the veins are dark brown. The hindwings are yellow at the base. The eggs are oval and flat, initially yellowish-white, gradually turning light brown. The larva is about 20 mm long, with a small dark brown head and a yellow-green body, with sparse white fine hairs on the sides and back.
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Identification and Control Methods of Southern Blight in Japanese Euonymus
Southern blight in Japanese euonymus is caused by a fungus and is characterized by being highly destructive and spreading rapidly. If not controlled properly, it can cause the death of all seedlings. Based on past work, we have summarized the characteristics and control methods of southern blight in Japanese euonymus. Symptoms: In the early stage of the disease, the stem or leaf base near the soil turns brown and rots. After a few days of sun exposure, white silky mycelium appears on the diseased parts and soil surface, spreading radially through the rhizosphere soil. Later, brown, rapeseed-shaped small sclerotia grow on the stem near the soil surface, often causing the death of the entire plant.
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A Detailed Explanation of the Common Causes of Deformed Mushrooms and Their Prevention and Control Methods
The manifestations of deformed mushrooms are diverse, and the main ones commonly seen in production are: landmine mushrooms, hollow mushrooms, big-butt mushrooms, hard opening and early opening, red roots, and water rust spots. Landmine mushrooms. The main cause of their formation is that the casing soil material is too coarse, the soil texture is somewhat hard, the casing soil is relatively thick, the surface layer of the casing soil contains relatively little water, while the temperature and humidity conditions of its lower part and the substrate are suitable for the occurrence and growth of fruiting bodies, so fruiting bodies are easily differentiated and formed on the surface of the substrate or in the middle and lower layers of the casing soil, and then emerge through the soil surface. Solution: select high-quality humus soil, and according to a certain ratio
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What to do when sawtooth mushrooms appear? Causes and control methods
The young mushroom fruiting bodies develop normally, but the edges of the caps look like sawteeth, uneven and jagged. The main cause of this disease is stimulation by strong wind. When the wind is strong, humidity drops, and the young tender oyster mushroom fruiting bodies are affected by these adverse environmental conditions, which disrupts their metabolism, damages the tissue cells at the edge of the caps, and produces sawtooth-shaped oyster mushrooms. Control methods: In windy weather, do not open ventilation openings or open fewer of them. If ventilation is urgently needed, when the wind is from the north open only the vents on the south side, and when the wind is from the south open only the vents on the north side. At the same time, increase the amount of water sprayed to raise the humidity in the mushroom shed.
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Prevention and Control Methods and Technical Key Points for Porcine High Fever Syndrome
"Porcine unknown high fever," also known as porcine high fever syndrome, is a disease with high morbidity and mortality rates, occurring mainly in growing-finishing pigs and some sows. The main clinical manifestations in affected pigs are elevated body temperature, depression, loss of appetite or complete anorexia, difficulty breathing, panting, with some pigs showing symptoms such as reddened to purplish skin, and a few having hemorrhagic spots at the hair follicles. The pathogens are mainly mixed infections and secondary infections involving multiple viruses, bacteria, and parasites, including classical swine fever virus (HCV), porcine reproductive and respiratory syndrome virus (PRRSV)
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How to prevent porcine epidemic diarrhea? A detailed guide to practical prevention and control methods
To prevent porcine epidemic diarrhea, vaccinate in advance with the attenuated porcine epidemic diarrhea vaccine or the inactivated vaccine; to prevent transmissible gastroenteritis, inject 1 ml of the attenuated transmissible gastroenteritis vaccine intramuscularly and intranasally in sows 45 days and 15 days before farrowing; there is no vaccine for rotavirus disease, so once sick pigs are found, isolate them early, inject 5%-10% glucose saline intravenously with 3%-5% sodium bicarbonate added, stop suckling the piglets, and prepare a glucose-glycine solution for the piglets to drink, with the formula: glucose 43.2
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Identification and control methods for the copper-green chafer
[Control methods] (1) Controlling adults The adults of the above several species of chafers all have the habit of supplementary feeding, mainly feeding on the leaves of trees, fruit trees, legumes and other crops. On young fruit trees, manual control can be used to capture adults to reduce damage. (2) Chemical control 2.5% trichlorfon powder can be used, broadcast at 30 kg per hectare on field crops. 40% dimethoate or omethoate emulsifiable concentrate at 1000 times dilution, or 20% fenvalerate 300
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How to control onion flies? A detailed guide to practical control methods
The onion fly, also called the onion maggot, is an oligophagous pest that only harms vegetables of the Liliaceae family, especially onions and garlic. Controlling the onion fly should adopt a method combining agricultural control and chemical control. When garlic bulbs are rotting, a topdressing of ammonia water can be applied along with watering, which can significantly reduce the damage. When root maggots are found in the field, watering should be done frequently, and flood irrigation can be used when necessary. Chemical control should combine aboveground and underground control, with adult flies controlled mainly aboveground. In the early stage of adult occurrence, you can use 80% dichlorvos emulsifiable concentrate at 800 times dilution,
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Control Methods for Boxwood (Buxus sinica var. parvifolia) Wilt Disease
Boxwood wilt disease has been a common disease of boxwood in recent years. It is characterized by rapid onset, fast spread, and a major impact on landscaping effects. Although this disease is stubborn, if correct measures are taken, targeting the pathogen and applying multiple approaches simultaneously, satisfactory control results can still be achieved. Symptoms: Initially, only the upper three leaves of a single branch of an affected boxwood turn green and dry out from water loss, and then the entire branch and three branches of the whole plant show green wilt and water-loss symptoms. In the late stage of the disease, the three leaves turn yellow-white, and severe infection can lead to plant death. Disease occurrence pattern
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How to grow a Boxwood (Buxus sinica) bonsai? Care management and pest and disease control methods
Boxwood (Buxus sinica), also known as littleleaf boxwood, thousand-year dwarf, etc., is an evergreen shrub or small tree of the genus Buxus in the family Buxaceae, native to the middle Yangtze River basin of China and the regions to its south. It likes warm, semi-shaded, humid climates, is drought-tolerant, cold-tolerant and tolerant of pruning, is a shallow-rooted tree species, grows slowly and lives long, and is an excellent tree material for making bonsai. Care management: Boxwood likes moisture and needs frequent watering to prevent leaf drop caused by water loss. From May to August is the vigorous growth period of boxwood, and several applications of thin, fully decomposed cake fertilizer can be made along with watering. Always pay attention to pruning
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