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How to prevent and control lily anthracnose? These methods you need to master
Symptoms: Leaves develop round, pale yellow spots, with dark brown margins. On petals the spots are round and flax-colored. They occur mainly on the outer surface of the upper half of the scales, and also on the inner surface. Initially irregular, light brown spots appear, later becoming light blackish brown and slightly sunken, and finally the diseased area becomes almost black, with the tissue shriveling and dry-rotting. The spots can extend several layers deep into the scales, but the outermost scales are affected most severely. Flower buds on diseased bulbs abort, turning brown to black, or large numbers of small water-soaked round spots appear on the flowers, merging with each other into irregular brown patches
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What are the control methods for lily anthracnose?
Lily anthracnose harms the leaves, stems, and flowers of the plant, causing premature leaf drop, severely affecting the plant's growth and development, and reducing its ornamental value. Symptoms: In the early stage of the disease, oval lesions appear on infected leaves, with a pale yellow center, purple-brown or dark brown edges, and a slightly sunken center. Lesions on petals are light brown and become thinner. Infected flower stalks turn black. Infected bulbs generally develop the disease on the outer scales, and sometimes also on the inner scales. In the early stage, light brown, irregular spots appear on the scales, after which the lesions
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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.
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Control Methods for Rust Spot Disease in Oyster Mushrooms
The rust-colored or dark brown spots appearing on the caps and stipes of oyster mushrooms are called rust spot disease of oyster mushrooms. This disease is a bacterial disease that easily occurs during the fruiting body growth stage of oyster mushrooms. The pathogen causing this disease is a species of Pseudomonas bacteria that is extremely widely distributed in nature. In the early stage of the disease, the spots are only the size of a needle tip and light in color, generally not affecting commercial value. As the disease worsens, the spots rapidly enlarge and their color continuously deepens, often appearing oval or spindle-shaped, or connecting with each other to form irregular large patches, with rust-yellow discolored areas around the patches.
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Control Methods and Technical Key Points for Physiological Diseases of Oyster Mushrooms
Oyster mushrooms have the characteristics of wide adaptability, strong stress resistance, a wide range of cultivation material sources, simple cultivation techniques, and high economic benefits. In recent years, oyster mushroom production has developed rapidly in our county, but in production, various non-infectious physiological diseases often occur due to poor management, causing yield reductions and directly affecting the economic benefits of oyster mushroom production. Based on many years of production practice experience, we have summarized the symptoms and control techniques of several main physiological diseases that commonly occur in oyster mushroom production. 1. Excessive mycelial growth In oyster mushroom production, excessive mycelial growth often causes the mycelium to become dense
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Symptom Identification and Control Methods for Licorice Gray Leaf Spot
It damages the leaves, forming nearly round brown lesions with gray centers. Control methods: (1) Clear the garden in winter and dispose of plant debris. (2) During the disease period, spray 1:1:120 Bordeaux mixture or 70% thiophanate-methyl wettable powder at 1500-2000 times dilution.
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Pinellia ternata pest and disease control methods and key technical points
(1) Root rot: This disease is prone to occur in hot seasons when water accumulates in the field. After onset, the underground tubers rot, and the aboveground parts then collapse and die. Control methods mainly focus on drainage, removing diseased plants and treating the diseased holes with 5% lime water or pouring it on the roots; alternatively, soak seeds in 0.5%-2% lime water for 12-30 hours at sowing time. (2) Viral disease: Manifested as leaf curling and mosaic, mostly occurring in spring and summer. After onset, diseased plants should be pulled up and burned, and the area disinfected with lime. (3) Red hawk moth: With
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Identification and Control Methods for White Grub Infestation in Codonopsis pilosula
Belonging to the order Coleoptera, family Scarabaeidae. It is the larva of the scarab beetle, mainly active in the soil, damaging the roots of Codonopsis pilosula. White grubs generally have one generation per year, with larvae or adults overwintering in the soil. After temperatures rise in the following spring, white grubs gradually move upward in the soil; when the soil temperature reaches above 15°C, they move into the topsoil layer above 10cm to feed. When summer temperatures rise and the soil dries out, they descend to deeper soil layers and stop feeding or moving. In autumn they return to the topsoil layer to be active, and after October they successively burrow down below 30cm to overwinter.
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Control Methods for Red Spider Mite Infestation on Codonopsis pilosula
Belongs to the class Arachnida, order Acarina, family Tetranychidae. Adults and nymphs gather in groups on the undersides of leaves to suck sap, and spin silk webbing, damaging leaves and tender shoots, causing leaves to turn yellow and eventually drop off; after flowers and fruits are damaged, they become shrunken and withered, spreading rapidly with severe damage, being most serious during dry autumn weather. Control methods: clear the garden in winter, pick up all dead branches and fallen leaves, and burn them in a centralized manner; after clearing the garden, spray 1-2°Bé (1-2 Baume degrees) lime sulfur mixture; in spring spray 0.2-0.3°Bé (0.2-0.3 Baume degrees) lime sulfur
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What are the pest and disease control methods for Codonopsis pilosula?
Codonopsis pilosula is a commonly used traditional Chinese medicine. It is widely cultivated in northern China, and its roots are used medicinally. It has functions such as tonifying qi and nourishing blood, harmonizing the spleen and stomach, and promoting fluid production and clearing the lungs. It is mainly used to treat various qi deficiency conditions such as shortness of breath and weakness, thirst due to fluid damage, weakness of the spleen and stomach, loss of appetite, loose and watery stools, cough and asthma due to lung deficiency, weakness after febrile disease, and prolapse of the anus due to qi deficiency. It has a very wide range of uses. The pest and disease control methods are introduced as follows: 1. Root rot often begins to occur during the high-temperature and high-humidity period from May to June in summer. It mainly occurs in Codonopsis pilosula plants that have been growing for more than 2 years. In the early stage of the disease, the lateral roots near the ground
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