MySheen

Powdery mildew of medicinal plant honeysuckle (honeysuckle)

Published: 2024-11-05 Author: mysheen
Last Updated: 2024/11/05, 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 was a small white spot at first, and then expanded into a white powdery spot. In the later stage, the whole leaf was covered with a layer of powdery powder, which was serious.

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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