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Identification of Honeysuckle Disease Symptoms and Control Methods
Brown spot disease is a common leaf disease that causes plants to grow weakly. It mostly occurs in the middle and late growth stages, with August and September being the peak period of onset, and it is severe under rainy and humid conditions. In the early stage of onset, small brown spots form on the leaves, then expand into brown round lesions or irregular lesions. Grayish-black mold-like substances grow on the underside of the lesions. When the disease is severe, the leaves fall off, affecting plant growth and flowering. Control method: prune diseased leaves, then spray with 1:1.5:200 Bordeaux mixture, once every 7 to 10 days, for 2 to 3 consecutive times. Powdery mildew occurs under warm and dry
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Detailed Explanation of Control Methods for Licorice Leaf Spot Disease
① The pathogen is a type of imperfect fungus (Cercospora astragali), belonging to the subdivision Deuteromycotina → Moniliales → Cercospora fungus. It damages leaves; affected leaves produce circular or irregular lesions, with the center of the lesion grayish-brown and the edges brown, and grayish-black mold-like growth on both the front and back of the lesions. Fruiting bodies grow on both sides of the leaf, but mainly on the upper surface; the stroma consists of only a few brown cells; conidiophores are born in bundles of 6 to 12, pale brown, with the apex lighter in color and narrower, unbranched, having 0 to 5 geniculate nodes, with the apex nearly truncate, spore scars prominent, and 1 to 7 septa; conidia are whip-shaped to obclavate, colorless and transparent, straight to curved, with the base truncate to nearly truncate, the apex slightly blunt, and 3 to 10 septa.
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Symptoms and Control Methods of Licorice Root Rot
Latin scientific name: Rhizoctonia solani Kuhn. Damage symptoms: Infected plants develop yellowed, withered leaves; the stem base and main root all turn reddish-brown and dry-rotted, with longitudinal cracks or red streaks on them; lateral roots are rotted or very few; diseased plants are easily pulled out of the soil; the vascular bundles of the main root turn brown; when humidity is high, pink mold grows on the roots. Morphological characteristics of the pathogen: generally caused by nematodes and Pythium species. Classification: called Rhizoctonia solani, a fungus of the subphylum Deuteromycotina. Disease occurrence characteristics: Fusarium is a soil-inhabiting fungus, in the soil
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Identification and control methods of the licorice seed weevil
Morphological characteristics: The adult is oval, brown or dark brown, with a body length of 2.5-3mm and a width of 1.5-1.8mm; the antennae are broad and short, serrate, and do not reach the base of the elytra. The pronotum is covered with punctures and dense light brown hairs, and its posterior margin is as wide as the elytra. The elytra are covered with punctures and dense light brown hairs. The pygidium is long, slightly pointed at the tip, and the ventral surface is covered with dense light brown hairs. The inner margin of the hind femur has 1 small, indistinct tubercle near the tip; the inner margin of the hind tibia has 1 long tooth at the tip; the first segment of the hind tarsus is the longest. Damaged crop: licorice. Damage symptoms: main
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Detailed Guide to Licorice Cultivation: Planting Methods and Management Essentials
Licorice, also known as sweet grass or sweet root, has the effects of harmonizing medicinal properties, reducing or alleviating drug toxicity, and moistening the lungs. It also has the characteristics of cold resistance, heat tolerance, drought tolerance, sensitivity to waterlogging, and light preference, making it an excellent plant for windbreaks and sand fixation. Its cultivation techniques are as follows: For site selection and land preparation, sandy soil with deep soil layers, a deep groundwater table, and good drainage should be chosen. The soil salt content should preferably not exceed 0.2%. Areas with excessive rain or where the soil is relatively clayey and drainage is poor are not suitable for planting, because the roots tend to rot or the main root is short, with many lateral and fibrous roots, resulting in low economic value. The seedling nursery should preferably be chosen on relatively flat
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Cultivation Techniques and Field Management Methods for Licorice
Licorice is a perennial herbaceous plant of the Fabaceae family, and the medicinal parts are the roots and rhizomes. It contains 5-11% triterpenoid compounds, glycyrrhizin, followed by flavonoid compounds such as liquiritin, liquiritigenin, isoliquiritin, isoliquiritigenin, etc. It is neutral in nature and sweet in taste, harmonizes the middle and relieves urgency, moistens the lungs, detoxifies, and harmonizes various medicines, making it an indispensable herb in many traditional Chinese medicine prescriptions. (1) Site selection and land preparation. Licorice prefers arid climates and is suitable for sandy loam soil with deep soil layers and a low groundwater table, which can achieve high starch content, low fiber, strong sweetness,
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How to prevent and control licorice rust? Detailed explanation of prevention and control methods
The pathogen is a basidiomycete fungus, mainly affecting the leaves. On the underside of infected leaves, yellow-brown blister-like lesions appear on one side; after the epidermis ruptures, brown powder is released, which are the uredinia and urediniospores of the pathogen. From August to September, dark brown teleutosori form. Prevention and control methods: 1. Collect diseased plant leaves and burn them. 2. At the early stage of disease onset, spray 0.3-0.4 degrees Baume lime sulfur mixture or 97% dithianon sodium 400-fold solution.
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Control Methods and Technical Key Points for Licorice Brown Spot Disease
Brown spot disease is an infection caused by a type of imperfect fungus (Deuteromycete), mainly damaging the leaves. Its symptoms are: circular or irregular lesions appear on the leaves, the center of the lesion is grayish-brown, the edge is brown, and black mold-like growth occurs on both sides of the lesion. Control methods: spray 1:1:100-1:1:160 Bordeaux mixture or spray 70% thiophanate-methyl wettable powder at 1500x-2000x dilution.
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Detailed Explanation of Licorice Propagation Methods and Cultivation Management Techniques
Propagation methods: use seeds, rhizomes, and division propagation. 1. Site selection and land preparation: sandy soil and loose red loam soil are suitable; apply 2500 kg of farmyard manure per 667 sq m, deep plow 40-50 cm in autumn, rake fine and level, and make high ridges with a ridge width of 40-50 cm and a ditch width of 30-35 cm. 2. Seed propagation: because licorice seed coats are hard and thick, making emergence difficult, before sowing mix crushed glass with an equal amount of seeds and grind for half an hour, giving a germination rate of about 85%; or use 3 times the seed volume of
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Detailed Explanation of Licorice Harvesting and Processing Methods (1)
Key Technical Measures for High-Yield Cultivation Choose fertile, loose-textured, well-drained sandy loam soil for planting. Treat the seeds before sowing to improve the germination rate, water the seedlings to keep them alive, and apply sufficient phosphorus and potassium fertilizer every early spring. Harvesting and Processing 1. Harvesting Licorice propagated from seed generally grows for 4 years after sowing, while that propagated from rhizomes can be harvested after 3 years of growth. Harvesting in autumn each year is best. When harvesting, dig up the licorice roots and rhizomes, shake off the soil, and set them aside for processing. 2. Processing Method Dig
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