White lentils scientific name Dolichos lablab L. It is a year-round herbaceous plant, medicinal flower and peduncle, known as "Southern bean flower". With stomach and dampness, spleen, antidiarrheal effect. Distributed in South China, East China and North China.
Symptoms White Bean Anthracnose causes cotyledon disease at the seedling stage, and adult plants damage the true leaves, stems, pods and beans. When cotyledons became infected, the cotyledons became infected after the seeds had germinated. The cotyledons had brown spots to reddish-brown spots on the edge of the cotyledons. When the humidity was high, pink viscous substances grew on the edges of the cotyledons. Spores. Severe cotyledons dry and die; adult plants grow black-brown dots on the leaves at the beginning of the disease, posterior lesions expand into small, polygonal strips along the veins, russet to black; petiole and stem disease and disease on the cotyledons Spots are similar; immature pods are infected and produce round to oblong craters, 0.5-1 cm in size, dark brown to black in the center, light brown or brownish red on the edges. After the white lentils have matured, the lesions become lighter in color and the edges are slightly Uplift, central depression; seeds infected lesions indefinite shape, yellow-brown to dark brown. The edge of anthracnose in lentil pods and leaves spread radially, and the presence of diffusion edges was different from other anthrax diseases. When the humidity is high, the diseased department secretes orange-red secretions, which are pathogenic bacteria conidium discs and conidia.
Pathogen colletotrichum lindemuthianum (Sacc. et Magn.) Bri. Et Cav. It is known as Phytophthora sp. For morphological features, see the book, Broad bean anthrax. The sexually active Glomerella lindemuthianum (Sacc. et Magn.) Shear et Wood said that the small pod of the bean is a fungus of the genus Ascomycota. The asccus shell is spherical to pear-shaped, with a diameter of 250-380 Î¼m; the ascospore size is 707-8 (Î¼m); the ascospores are cylindrical and the size is 15-224-6 (Î¼m). The asexual conidiospores were 50-100 Î¼m in diameter, surrounded by bristles, and the size was 30-603-5 (Î¼m); the conidia were elliptical and the size was 15-193-5 (Î¼m). Harm the lentils, beans, beans, mung beans, broad beans, peas, cowpeas, etc. In addition, it has been reported that C. Truncatum (Schw.) Andr. Et Moore said that the flathead spinosa can also cause the disease.
Transmission routes and pathogenic conditions The main pathogens are mycelia latent under the seed coat or mycelium overwintering on the ground with the diseased body. In the following year, the sick seeds were sown to cause the seedling cotyledon or tender stems to become infected. The conidia produced in the diseased part were re-infested by spreading insects and wind and rain. Soybean meal was found to be infected. The pathogens entered the seed coat through the shell of the oysters and caused the seeds to become bacteria. Temperature 17-20 Â°C, relative humidity 100% conducive to disease. The production is warm and humid, rainy, dew, fogy, low-lying, high density, and severe disease.
Control methods (1) Selection of disease-resistant varieties and selection of disease-free seeds. Seedlings are harvested from disease-free alfalfa, seed disinfected if necessary, soaked in warm water at 45Â°C for 10 minutes, or 40% formalin at 200-fold for 30 minutes, then rinsed and air-dried for sowing. Seed weight can also be seeded with 0.3% of 50% Formamide powder or 0.2% of 50% tetrachlorophenylhydrazine, 0.2% of 50% carbendazim wettable powder. (2) Remove the diseased body promptly after harvest to reduce the bacteria source. (3) Advocate the use of compost made from Japanese enzyme bacteria or fully decompose organic fertilizer. Severely affected fields are implemented for 2-3 years. Early sowing, appropriate depth, when removing seedlings, remove the diseased seedlings, and strengthen fertilizer and water management. (4) The old rack bar should be spray sterilized with 50% Daisen ammonium water agent 1000 times before inserting the rack. (5) Begin spraying 80% of anthrax fume WP 900 times or 50% benomyl WP 1500 times, 50% carbendazim WP 600 times, 80% WP 500 times liquid, 30% basic copper sulfate suspension 400 times liquid, 1:1:240 times Bordeaux mixture, every 7-10 days, continuous control 2-3 times. Discontinue medication 3 days before harvest.
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