Symptoms mainly affect wheat stems, leaves and ears. When the plant height is about 0.33m, a stripe-like spore pile parallel to the veins appears in stem, leaf, leaf sheath and other parts. The spores were slightly raised, white, and then turned gray to black. After the diseased tissue became old, the spores broke and black powder, spores, was emitted. Diseased plants are often dwarfed, deformed or curled, and most diseased plants cannot head and curl in leaf sheaths, or pull out deformed spikes. There are many childbirths and there are sometimes more than one hundred childbirths. Astragalus Membranaceus, also known as Mianqi. Herbs perennial, 50-100 cm tall. The main roots are thick, woody, often branched and gray-white. Stems erect, upper branched, finely angled, white pubescent. Herbs perennial, 50-100 cm tall. It is produced in Inner Mongolia, Shanxi, Gansu, Heilongjiang and other places. Astragalus Membranaceus Astragalus Membranaceus,Astragalus Membranaceus Root,Astragalus Membranaceus Extract,Astragalus Membranaceus(Fisch)Bge Lixian Spring Pharmaceutical Co., Ltd. , https://www.lxctyy.com
Pathogen Urocystis tritici KOrn wheat smut powder, synonymous Urocystis agropyri (Preuss) Schrot. Basidiomycotina fungi. The pathogen is teliospores round or elliptic, brown, 12-169-12 (μm) in size, and is composed of 1-4 teliosporites forming a round to elliptic teliospores, brown, of size 35-4018-35 (μm). , There are many infertile cells around, colorless or brown. After the germination of the teliospore, the first mycelium was formed, and the top of the rotted 3-4 spores. The spores are cylindrical to long rod-shaped and slightly curved. The bacterium contains different specialized types and physiological races.
Transmission routes and pathogenic conditions The pathogens were scattered in the soil with teliospores or adhered to the surface of the seeds and fertilizers during the winter or the summer in order to become the initial infection source of the disease. After germination, the teliospore invaded from the coleoptile and reached the growing point. It was a systemic infestation disease of the seedlings and did not re-infect. The occurrence of this disease is related to the soil temperature during the germination period of wheat. The soil temperature can be infected at 9-26°C, but the soil temperature is suitable for about 20°C. In addition, the incidence or not, the incidence of high and low are related to soil moisture content. Generally, the dry land is heavier than the wet land mass. The incidence of sowing in the northwestern region in October is high. There is a significant difference in disease resistance among varieties.
Control methods (1) Selection of disease-resistant varieties such as Beijing No. 5, Aberdeen, Xiaofeng No. 1, and Xiaofeng No. 2. Use disease-free seeds. (2) In areas where soil-borne diseases predominate, one-two-year rotations with non-host crops can be carried out. (3) Fine soil preparation, promote the application of compost or net fertilizer made by Japanese enzyme strains, sowing them properly, and avoid excessive depth to facilitate emergence. (4) Soil-borne disease areas advocate the use of 40% seed weight 0.2% seed dressing double or 0.3% 50% thiram seed dressing. In other regions, it is best to use seed fungicide such as 20% triadimefon with 0.02% active ingredient or 15% triadimenol with 0.015%-0.02% active ingredient. See specific methods for wheat smut.
The medicinal use of Astragalus membranaceus has a history of more than 2000 years. It has the functions of enhancing immune function, protecting liver, diuresis, anti-aging, anti-stress, antihypertensive and a wide range of antimicrobial activities. However, it is forbidden to use the evidence of excessive superficial pathogenic factors, stagnation of qi stagnation and dampness, stagnation of food accumulation, excessive heat and toxicity at the beginning of carbuncle or after ulcer, and excessive Yin deficiency and yang.
Wheat stalk smut