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Methods for the prevention and control of Angelica sinensis pests and diseases and key technical points
(1) For stem nematode disease (má kǒu bìng), the peak periods of occurrence are in mid-April, mid-June, early September and early November after transplanting; it damages the roots, and an abundance of soil-dwelling pests favours its occurrence. Control methods: ① Per mu, use 3 kg of 3911 granules mixed evenly with 15 kg of fine soil, or 0.5 kg of 20% methyl isofenphos emulsifiable concentrate mixed with 2.5 kg of water and sprayed onto 15 kg of soil and mixed evenly, then broadcast and turn into the soil; ② Regularly drench the roots with a broad-spectrum, long-lasting insecticide; per mu use 250 g of 40% carbendazim suspension concentrate or 600 g of thiophanate-methyl plus
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Licorice Pest Control Methods and Technical Key Points
(1) Leafhoppers: mainly the elm leafhopper, the small green leafhopper, etc. They occur throughout the entire growing period of licorice, with the most severe damage from late June to mid-August. Nymphs or adults suck the sap of licorice leaves, buds, young branches and young shoots, first showing silvery-white dot-like spots, then the leaves lose chlorophyll and turn pale yellow, and finally fall off. Control methods: Clear the elm trees and other overwintering hosts of leafhoppers around the licorice field. At the peak of infestation, spray with 2.5% deltamethrin at 1000-1500 times dilution. Use natural enemies such as cotton aphid parasites and ladybugs
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Licorice Pest and Disease Control Methods and Key Technical Points
(1) Rust disease: After infection by fungi, yellow-brown blister-like lesions appear on the underside of leaves; when they rupture, brown powder is released, which consists of the pathogen's telial and urediniospore stacks; in August and September, dark brown telial stacks form. Control methods: Gather diseased plants and burn them. In the early stage, spray 0.3-0.4 degrees Baumé lime sulfur mixture or 97% dithianon sodium 400-fold solution. (2) Brown spot disease: After infection by fungi, round and irregular lesions appear on leaves, with a grayish-brown center and brown edges; gray-black mold-like growth occurs on both the front and back of the lesions. Control
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Licorice Pest and Disease Control Methods and Key Technical Points
(1) Rust: occurs from May to June, damaging leaves. Control methods: ① Gather and burn diseased branches; ② Spray 90% nabam at 400 times dilution in the early stage of the disease. (2) Brown spot: occurs from May to June, damaging leaves. Control methods: ① Gather and burn diseased branches; ② Spray 1:1:100-160 Bordeaux mixture or 70% thiophanate-methyl wettable powder at 1500-2000 times dilution in the early stage of the disease. (3) Powdery mildew: occurs from May to June, damaging leaves. Control method: Spray 0.2-0.3 degrees Baume lime sulfur
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Methods and Technical Key Points for the Prevention and Control of Licorice Pests and Diseases
The main diseases of licorice are rust, powdery mildew and brown spot. Licorice rust mainly damages the leaves and tender stems of the plant; the back of infected leaves produces yellow-brown blister-like lesions on one side, and after the epidermis ruptures, brown powder is released. Prevention and control method: burn the leaves of diseased plants. In the early stage of the disease, treat with a 1000-fold dilution of Fenxiuning; you can also use 0.3 degrees Baume lime sulfur mixture, or a 500-fold dilution of 65% wettable zineb, or a 200-fold dilution of dithianon sodium for spray control, spraying once every 7 to 10 days, and 2 to 3 consecutive sprays are sufficient. Licorice brown spot is also called
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Comprehensive Pest and Disease Control Methods and Technical Key Points for Goji Berry
Goji berry, as a traditional Chinese medicinal herb, not only has high medicinal value, but its fruit, leaves, stems, and roots can also be eaten or drunk. With the improvement of people's living standards, in recent years more and more varieties of goji berry wine, pastries, and other products have been developed, and the usage is also increasing. The commonly occurring pests and diseases of goji berry mainly include: aphids, goji berry leaf beetles, whiteflies, cotton bollworms, gall mites, and powdery mildew, anthracnose, leaf spot disease, viral disease, etc. The comprehensive control technical measures are introduced as follows. Control principles: prevention first, combining prevention and control. Strategically, focus on healthy cultivation and biological control,
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Control Methods and Key Technical Points for Pests and Diseases of Honeysuckle
Honeysuckle, also known as silver flower or Japanese honeysuckle flower, is the dried flower bud of plants in the Caprifoliaceae family and several plants of the same genus. It has the function of clearing heat and detoxifying, and is suitable for diseases such as seasonal febrile diseases with fever, wind-heat common cold, sore throat, pneumonia, dysentery, and carbuncles, swellings, sores and ulcers. It is a commonly used traditional Chinese medicinal material, with annual national sales reaching 5.5 to 6 million kg. Honeysuckle is produced in most provinces and regions across the country, among which Shandong, Henan and Guangxi have the largest output and the best quality. Honeysuckle has relatively many pests and diseases, and doing a good job of prevention and control is the key to increasing honeysuckle yield and ensuring market supply
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Methods and Technical Key Points for Quality Evaluation in Tea Plant Breeding
Methods for evaluating the quality traits of individuals, types, or strains in tea plant selection and breeding. The quality of tea generally refers to the four factors of "color, aroma, taste, and shape," collectively known as appearance and internal quality. Direct quality evaluation involves producing finished tea according to the picking standards and processing techniques of different tea types, and then assessing the quality. Using a small amount of fresh leaves and small-scale machinery to make tea is called the "small-amount tea-making method," which is the early quality evaluation of young tea plants or individual plants. Indirect quality evaluation is based on the correlation between bud and leaf morphology and the quality of finished tea, using field observations and instrumental analysis for evaluation.
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Tea plant breeding yield identification methods and technical key points
A method for measuring the breeding yield of tea plants (individuals, lines or strains). The direct measurement of yield is calculated based on the harvested amount of buds and leaves per unit land area of the tea plant. ① Annual picking calculation method: according to a certain picking standard, pick in stages and batches by plant or plot, then separately count the total yield of each season within a year. In black tea and green tea regions, picking is generally done at the standard of one bud and two or three leaves; in dark tea regions and oolong tea regions, picking is done at the standard of 4-5 leaves at the resting shoot. In the later stages of breeding, yield performance must be measured to identify production potential.
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Identification Methods and Technical Key Points for Tea Plant Breeding Materials
Observe the traits of breeding materials, analyze the characteristics and features of various variant materials, select the superior and eliminate the inferior according to breeding objectives, and finally develop new varieties through comparative trials. The identification content is divided into 3 aspects: yield traits, quality traits and resistance. The yield traits of tea plants are mainly reflected in sprouting density and bud-leaf weight, growth speed, length of growth period, regeneration capacity after picking, and recovery capacity after suffering disasters or wounds; quality traits are mainly reflected in the chemical composition, color, pubescence,
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