The symptoms of yam erythema are caused by nematodes. Diseases during growth, affect tuber development, small tubers, light weight. The nematodes mainly infect underground tubers, initially forming reddish-brown near-circular to irregular-shaped, slightly concave spots on the tubers. The single lesions are small and the size is 2-4mm. On the diseased tubers, the lesions are dense and merge with each other. Large patches of dark brown, surface with fine tortoises, lesion depth of about 2-3mm, the deepest is more than 1cm, pathogenic tissue was brown dry rot. Pathogen Pratylenchus dioscoreae sp. Nov. The short-line nematode Dioscorea zingiberensis is a new species of the genus Brachyspira and is a plant-parasitic nematode. There are two ring patterns on the head of the short worm of Dioscorea zingiberensis, and 6-8 lateral lines at the lateral bands. The female zygomas are large and round with a seminal vesicle. The average length of the body is 695.5 μm, and the average length of the oral needle is 18.3 μm. The tail is usually smooth. Therefore, it is different from other species existing in the genus. Yam broccoli and short staminal worm Pratylechus brachyurus, coffee short worm corpse. Coffeae is similar to P.obtusicaudatus. The difference between the short and short worms is that the body has a long, short body. Transmission routes and pathogenic conditions Dictyophorus zeae can survive in the soil for more than three years. The pods (disease locust), diseased body, and diseased soil are The main method of disease transmission, round beans do not spread disease. The life history of short worms of Dioscorea nematophila is extremely irregular and can often be found in individual larvae. It is about 2 generations old and only infests yam. When new tubers begin to form in early June, the nematode can infect, and then the infection gradually increases. Until harvested. Tubers can suffer from more than 40cm from the top of the reed, with lesions ranging from 0 to 20cm. Control methods (1) and wheat, corn, sweet potato, potato, cotton, tobacco, pepper, eggplant, tomato, mustard, radish, carrot, watermelon, Radix, aster, yellow flower, northern sea cucumber, atractylodes, leeks, purslane, etc. Crops that have not been infested are subject to rotation for more than three years. (2) In combination with 0.1% to 0.3% TMK soaked seed pods for 24 hours, the disease-prevention effect is 95% or more; in the case of cultivars with diseased pods and double pods, 15% TMK granules are applied per 667m' before sowing. 2kg, 75% control effect. (3) Disease-free species breeding in disease-free fields, or treatment of seed pods with TMK, combined with rotation and application of disease-free fertilizer and other comprehensive disease prevention measures.
Chongqing "Terson card" Coptis, Department of Chongqing Shizhu Tujia Autonomous County specialty, China National Geographical Indications products (native geographical products). Because produced in Shizhu County, Yellow River National Forest Park, also known as "yellow Coptis." Coptis Coptis Coptis Coptis Coptis Chinensis Franch dried rhizomes, medicinal products for the "taste even", commonly used expensive Chinese medicine, Shizhu County Coptis original area, China's Coptis town, due to the high quality, was identified As "Sinopharm" "Authentic Coptis". Coptis has the characteristics of branch fertilizer, flesh thickness, length, color and high content of active ingredients. Its content of berberine (also known as berberine) is 5.20-7.69% (Chinese Pharmacopoeia 2015 edition shall not be less than 3.6% ); Coptis alkaloids (Coptis, Worenine, Palmatine, Jatrorrhizine, etc.) content below 0.5%. In addition, it contains Magnoforine and a Lumicaruleic acid, Ferulic acid.
Coptis
Heat Dampness Coptis,Selected Coptis,High-Altitude Shizhu Coptis,Wild Stone Column Coptis
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