This year due to the influence of bad weather, the onset of purple spot disease of onion is more serious, and it has become prevalent in the main producing areas of onions. The severely hazardous fields have caused the onion leaves to die. The symptoms of purple spot disease are identified and controlled as follows: First, the symptoms of purple spot disease mainly onions, green onions, but also infestation of garlic, leeks. On the onion mainly damage leaves, pedicels, bulbs. Lesions begin from the tips of the leaves, or form in the wounds that are damaged by the thrips. The lesions are small at the beginning, gray to light brown, and the center is slightly purple, with black and grey molds. The lesion quickly expanded into an elliptical or spindle-like shape, with a concave, dark purple, concentric ring pattern, and yellow halos around it. When the humidity is high, the lesion expands to the whole leaf, often causing the onion leaves to turn yellow from the bottom up and die or break, seriously affecting the yield and quality of fresh onions. Second, prevention and control methods Clean the pastoral areas and remove infectious sources such as sick bodies. 2. Strengthen management, apply more basal fertilizer and top dressing, make onions grow stronger, and increase resistance to disease. After the onset of disease, irrigation should be controlled to reduce the soil moisture and prevent the trachea from being damaged as soon as possible. 3. Chemical control: Seeds are soaked with 30% formaldehyde 300 times for 3 hours. Wash immediately after leaching. At the beginning of the onset, spray 75% chlorothalonil wettable powder 600 times, 64% antivirus WP 500 times, 80% Green Hunter Mansonite 500 times, 40% Dafu 500 times, 50% Due to 1500 times the liquid, 2% more antibiotics 30ppm, 50% fast-king 30-50 grams, onion garlic germ net spray and other agents. One or more of the above agents may be used, and each agent should be used alternately, once every 7-10 days, and continuously controlled 3 times. Adding 5-10 grams of neutral laundry detergent per 10 kilograms of liquid can increase the adherence of the liquid. RP International Ltd is top Nisin Supplier and Manufacturer in China. Nisin Preservative,Natural Preservatives Nisin,Nisin Powder Food Grade,Food Additive Nisin RP International Ltd , http://www.rp-foodadditives.com
Nisin (CAS 1414-45-5) is light brown powder, a polycyclic antibacterial peptide produced by the bacterium Lactococcus lactis that is used as a food preservative. Streptococcus, security is very high. Lactic streptococcus, but with other preservatives of anti-corrosion system, can effectively protect the food from microbial destruction, now is widely used in meat products, dairy products, etc.
Our Annual output is 1000mt. We have professional product line for Food Preservative Nisin. Our products are Kosher, ISO, Haccp, Halal certified with best quality and strict quality control.
With regards to the productions and quality control, We has advanced manufacturing facilities and professional R&D team which providing customers with safe, healthy, hygienic and high-quality products. All the productions are processed strictly in accordance with the regulations of HACCP and ISO system. We also provide value-added services based on customers` personalized requirements in both product application and technical support.
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