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How to control boxwood pests? These methods are very practical
The larvae damage host plants such as boxwood, small-leaved boxwood (Buxus sinica), big-leaved boxwood (Buxus megistophylla), little-leaved boxwood, Japanese boxwood (Buxus microphylla), spoon-leaved boxwood, Korean boxwood, and holly by spinning silk to tie leaves together into nests. The damaged leaves first show yellow blighted spots, and later the entire leaf falls off. By spinning silk, they bind the leaves and the damaged fallen leaves together, preventing the leaves from spreading out, so growth and development are severely affected, and in severe cases the whole plant dies. In Shanghai, 3 to 4 generations occur per year, with severe overlapping of generations; they become active in March of the following year, begin pupating in mid-April, and begin emerging in late April
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Causes and Control Methods of Yellow Mushroom Disease in Pleurotus pulmonarius
In recent years, because Pleurotus pulmonarius has good economic returns and can fill the gap in summer edible mushroom products, its production in Jiangshan City has developed rapidly, and by 2004 the total had exceeded 8 million bags. However, in the recent period, some mushroom farms in Jiangshan have experienced mushroom death. Through observation, it was clearly determined that the dead mushrooms were caused by yellow mushroom disease. 1. Symptoms of yellow mushroom disease. Yellow mushroom disease is a bacterial disease caused by infection with Pseudomonas bacteria, which causes the fruiting bodies to discolour, rot and stink, and the incidence rate is generally higher in the first flush. When the disease occurs, a slime-like pathogen appears on the surface of the mushroom bags, part of the mycelium shows yellowing symptoms, and in severe cases the pathogen directly attacks the mushroom bodies, causing the affected mushrooms to develop lesions, turn yellow, and even die. It takes only a few hours from infection of the mushroom body by the pathogen to the appearance of symptoms (dead mushrooms). ① Dry rot type: it can occur from the young mushroom stage to the mature stage; after onset, the cap or stipe shows localized scorched yellow, causing light-coloured mushrooms to become yellow mushrooms, and the mushroom bodies grow slowly, gradually becoming rigid until the whole mushroom body shrinks and dries up, like being dried by lack of water. ② Wet rot type: the affected site or the entire cluster of mushrooms has a sticky, moist feeling; in severe cases, all diseased mushrooms show pale yellow water-soaked rot, with sticky secretions and a foul odour.
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Identification and control methods for Apophylia thalassina
Scientific name Apophylia thalassina (Faldermann), order Coleoptera, family Chrysomelidae. Also known as wheat stem leaf beetle, wheat golden flower beetle. Its distribution runs from Heilongjiang and Inner Mongolia in the north, its southern limit does not cross the Huai River, and it reaches Gansu and Qinghai in the west. It is becoming increasingly serious in Shanxi, Gansu and Hebei. Hosts include wheat crops, corn, goji berry, thistle, willow, etc. Damage characteristics: the larvae bore into the wheat stem from 1.5cm below the soil surface to cause damage, resulting in dead hearts, dead seedlings, white heads and ineffective tillers, causing large areas of wheat fields to have missing plants and broken rows
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Causes and Control Methods of Ginger Bacterial Wilt
1. Symptoms The pathogen attacks the roots and the underground and aboveground stems. The affected underground fleshy stem initially becomes water-soaked and yellowish-brown, loses its luster, and then the internal tissues gradually soften and rot, leaving only the outer skin. Squeezing the diseased part exudes a dirty white turbid juice with a foul odor; the affected roots also turn pale yellowish-brown and eventually rot completely. The affected aboveground stem turns dark purple, and the internal tissues turn brown and rot, leaving fibers behind. The affected leaves appear wilted, turn pale yellow, with curled edges, and eventually the whole plant dies. 2. Pathogen This disease is caused by the bacterium Pseudomonas solanacearum (P
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Control Methods for Bacterial Diseases in Orchids (Part Two)
Bacteria are also single-celled organisms and can only be seen under a microscope. The harm bacteria cause to plants is mainly through the production of toxins, which cause plant rot or tissue death, or block and destroy vascular bundles, forming tumors. Since bacterial control is relatively difficult, the best control method is to prevent the occurrence of the pathogens. 1. Orchid brown rot is one of the common bacterial diseases worldwide. Its pathogenic bacteria are Erwinia cypripedii, Pseudomonas gladioli, etc., and it mostly occurs in humid, warm environments. It generally damages the
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Control Methods for Anthracnose Disease in Japanese Euonymus
[Symptoms] Japanese euonymus anthracnose is distributed throughout the country. In the early stage of the disease, water-soaked yellowish-brown small spots appear on the leaves, with an indistinct boundary between diseased and healthy tissue, and the lesions later expand. In the late stage, the affected areas turn yellow, and small black dots (conidial acervuli) appear on the lesions, arranged in distinct or indistinct concentric rings. It often causes leaf blight and premature leaf fall. [Pathogen and disease pattern] Caused by the fungi Colletotrichum griseam Heaidet Waif and Gloeosporium frigidium Sate. of the Deuteromycetes
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How to prevent and control powdery mildew on Japanese euonymus? These methods you need to know
Symptoms: The disease affects leaves and twigs. The lesions are mostly distributed on the upper surface of the leaves. In the early stage of the disease, many small white round spots are scattered on the infected leaves. As the lesions gradually expand and merge with each other, they become irregular large spots. When the disease occurs severely, the infection rate of new shoots can reach 10%. White powder appears on the entire surface of the leaves and new shoots. The diseased leaves gradually lose green, turn yellow, and finally turn brown-black. The diseased parts become deformed, the diseased leaves shrink, and the diseased shoots twist and wither. Pathogen: The pathogen is Oidium euonymi (Are.) Sa
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Detailed Guide to the Main Pest and Disease Control Methods for Euonymus japonicus
Euonymus japonicus, as an evergreen shrub, is one of the most commonly used landscaping plants for urban streets, plazas, parks, institutional courtyards, and residential green spaces. Because its growing environment conditions vary greatly and management measures tend to be extensive, its pests and diseases also occur and cause damage rather severely, seriously affecting the urban landscaping landscape. Investigating and studying the occurrence characteristics of the main pests and diseases of Euonymus japonicus allows for the formulation and implementation of control measures suited to local conditions, achieving the goal of controlling damage and beautifying the environment. 1. Occurrence characteristics of the main pests and diseases (1) Euonymus japonicus powdery mildew. Powdery mildew is a common disease of Euonymus japonicus
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Control Methods for the Boxwood Narrow Jewel Beetle
Large-leaf boxwood (Euonymus japonicus) is a tree species widely used for landscaping. In recent years in the Nantong area, large-leaf boxwood has been found to die off, initially in scattered patches and gradually developing into large areas of dieback. Breaking off dead trees at the root collar revealed insect-bored tunnels. Observation showed this to be damage by the narrow jewel beetle. The large-leaf boxwood narrow jewel beetle belongs to the order Coleoptera, family Buprestidae, genus Agrilus. This insect's larvae bore into and feed on the stems of large-leaf boxwood, weakening the plants until they die. I. Morphological Characteristics Adult: body length 5-7 mm, compactly built, head and thorax dark brown
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How to deal with leaf spot disease on Euonymus japonicus? Detailed explanation of prevention and control methods
Euonymus japonicus is a commonly used evergreen small shrub grown for its foliage in landscaping, and it has many advantages, but the occurrence of leaf spot disease causes the plant to drop its leaves prematurely, resulting in bare branches and even death, seriously affecting the normal growth and ornamental effect of Euonymus japonicus. Symptoms of leaf spot disease: In the early stage of the disease, there are small yellow spots on the leaves, which gradually turn yellowish-brown and expand into round or irregular spots. The diameter of the spots is 2 mm to 10 mm. In the later stage, the spots are grayish-brown or grayish-white with darker edges, and many small black dots grow on the spots.
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