Powdery mildew of medicinal plant honeysuckle (honeysuckle)
The scientific name of honeysuckle LonicerajaponicaThunb. Alias honeysuckle. Belongs to perennial rattan shrub of honeysuckle family. Used in medicine with buds or flowers to bloom. Leaves and branches can also be used as medicine. It has the effect of clearing away heat and detoxification. Since the 1960s, it has changed from wild to domestic species, and now it has been planted in many cities and counties from south to north, with an once large area.
The main symptoms are damage to leaves and sometimes to stems and flowers. The disease spot on the leaf is a small white spot at first, and then expands into a white powder spot. In the later stage, the whole leaf is covered with a layer of powdery powder, and when it is serious, the leaf is yellow and deformed or even deciduous; the disease spot on the stem is brown, irregular, and there is white powder on it; the flower is twisted and falls off seriously.
Pathogen Microsphaeralonicerae (Dc.) Wint.inRabenh. It is called honeysuckle fork filamentous shell, which belongs to the subphylum Cystis. Ascomycetes are scattered, globose, dark brown, 65-100 μ m in size; 5 Mel 15 accessory filaments, 55-140 μ m long, 0.7 Mel 2.1 times the diameter of ascomycetes, colorless, without septum or with 1 septum, 3 Mel 5 times double bifurcate. There are 7 ascomycetes, ovoid to oval, with a size of 34m 58 × 29m 49 (μ m). The ascospores 2 are 5, oval, and the size is 16.3, 25 × 8.8, 16.3 (μ m). The asexual state is Oidiumsp. The mycelium, leaves on both sides, conidiophores erect, size 50-94 × 7mur10 (μ m), conidia 2murine 3 series, a few solitary, oval, cylindrical, to basal type, size 28 Mel 49 × 12 Mel 20 (μ m).
The pathogens overwintered in ascomycetes on the remnants of the disease. The ascospores were released from the ascomycetes in the following year for primary infection, and after the disease, conidia were produced for re-infection. Warm, dry or shaded between plants is easy to develop. If too much nitrogen fertilizer is applied, the disease will be serious alternately between dry and wet.
Control methods (1) select disease-resistant varieties, pay attention to pruning, increase ventilation and light transmission. (2) spraying 2000 times of 50% colloidal sulfur 100g to water 20kg or 15% triadimefon wettable powder at the initial stage of the disease.
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Atriben honeysuckle, which is easy to propagate and work quickly.
The product is an evergreen shrub with strong upright, no winding in the upper part of the flower branch, many branches, fast growth, dense buds, 20-30 clusters of buds, easy to pick, florescence from May to June. The average dry flower yield of 5 years old is 180 kg per mu, and the content of chlorogenic acid is 5%-5.8%. It has strong disease resistance, barren resistance and easy reproduction. It can be planted in mountain rock seam embankment, plain dam, Weir ridge and roof edge gap land.
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Cultivation techniques of Medicinal Flos Lonicerae
Honeysuckle, also known as honeysuckle, Erhua, is distributed in most parts of the country; there are many varieties, Guangdong mainly produces honeysuckle. Perennial evergreen rattan shrub of South China honeysuckle family, used medicinally with flower buds, first-blooming flowers or rattan leaves. The drug has the properties of heat-clearing and detoxification, and has broad-spectrum antibacterial, antiviral and antifungal effects. At present, there is a great demand for medicinal honeysuckle. In 2000, the purchase price was 3249 yuan per kilogram, and the price still has room to rise after China's entry into the WTO. Honeysuckle has a wide range of growth adaptation, including drought-resistant, hard-working, cold-resistant and heat-resistant sun-loving plants.
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