Symptoms can only be seen on the leaves. At the beginning of the formation of dark purple round lesions on the leaves, or on the edge of the arc formed spots, the size of 0.5-1.5cm, the junction between the disease and health department is not obvious, the disease department softened, dry on sunny days. It can also develop after being inoculated into the stem or the English.
Pathogen Phytophthora nicotianaae var. nicotianae (Breda et Haan) Waterhouse synonym P. nicotianae var. parasitica (Dast) Waterh., P.allii Sawada., P. melongenae Sawada. Phytophthora nicotianae is a flagellin-borne fungus. Mycelial cotton wool is white and not separated, spreading to host cells. The cyst stalk is colorless and thin, about 10 to 744um long and 6um wide, and each 2-3 bunches protrude from the stomata. Sporocyst pear-shaped, colorless, with a prominent milky protrusion, size 30-5816-45 (um), is not easy to produce sporangia on the plant, quickly formed after immersed in water. When the sporangium germinates, it produces an oval-shaped flagella. When it matures, it escapes from the bursa and then germinates and sprouts to invade the host after swimming and rest. The oviculum is smooth, with a size of 26; 30um, and one oocyst. Male obovate to spherical or oblate spheroid, diameter 12 to 18um; oospore spherical, colorless, smooth, size 21 to 24um, sometimes seen in withered stems and leaves, but less. In the natural conditions or artificial culture can produce the top of the chlamydospore, and later into a light yellow, size 26 - 37um. Wherever there is tobacco, the bacteria can be seen. In addition to harming broad beans, it can also harm tobacco, green onions, solanaceous plants, carrots, and the roots of the Mazda camp.
Transmission Pathways and Pathogenic Conditions Germs use oospore to overwinter on sick bodies or seeds. In the following year, zoospores are produced when the conditions are suitable. Invading from the germinal stem below the cotyledon, the hyphae spreads upward along with the growing point and enters the bud or true leaf to form a systemic infestation. Afterwards, a large number of sporangia and spores are produced, spread by wind and rain, Reinfection was performed and the epidemic was established after multiple infections. The average temperature in the rainy season is 20-24°C.
Control methods (1) Select disease-resistant varieties and leave them as disease-free seeds. (2) A rotation of 2 years or more is implemented. (3) Clean the idyllic remains, burn them together and plough the land in time. (4) According to the formula fertilization, reasonable dense planting. (5) Chemical control 35% metalaxyl seed dressing, seed dressing at 0.3% of the seed amount; spraying 1:1:20 times Bordeaux mixture or 90% triethylaluminum phosphate wettable powder 500 times Liquid, 60% saponin aluminum phosphorus wettable powder 500 times liquid, 72% gel or 72% frost mangold Zn (Ke Kang Ling) WP 800-1000 times liquid. The area where the above fungicides produce resistance can be changed to 69% ank manganese zinc wettable powder or water dispersible granules 1000 times liquid, once every 10 days, 1 or 2 times.
Oxygen Cylinder Filling System
With PSA principles, ETR Oxygen Cylinder Filling system can produce 93%±3% purity oxygen gas from compressed air directly. ETR oxygen cylinder filling system is consisted of Atlas screw air compressor, refrigerated air dryer, compressed air filter, air buffer tank, ETR Oxygen Plant, oxygen buffer tank, oxygen booster, cylinder filling station and HMI control cabinet.
Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure. With an oxygen booster, the oxygen pressure can be to 150bar and fill in cylinders.
Onsite Oxygen Cylinder Filling System
Onsite Oxygen Cylinder Filling System,Oxygen Refilling System ,Oxygen Cylinder Filling,Oxygen Refilling Machine
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