First, the difference between the two is to harm the young parts of the plant, so that the leaves become smaller deformed, brown leaves, plant dwarf, etc., serious when fallen leaves, fallen flowers, fruit drop and so on. In the early stage of virus disease, the leaf veins of the heart regress from green, gradually turning into leaf shrinkage. Afterwards, the diseased leaves thicken and the leaf margin curls to the front to form a buckle. However, the hazard of the tea plant is chlorosis of the whole leaf, and the leaf edge curls toward the back. Under the bucket. When the virus disease harmed the fruit, dark green and light green spots and verrucous ridges appeared. When the tea radix threatened the fruit, the surface of the pedicel and stalk was grey to gray brown and lost its luster. It was corked and hardened. Virus disease damages the main veins of leaves with brown or black necrosis and gradually spreads to the lateral branches, main stems and growing points, and the hazard of the ocheriferous leaves is that any part on the back of the leaves may be grayish brown or brownish and have oily luster.
Second, the prevention and treatment of viral diseases: 1 selection of disease-resistant varieties, such as Zhongjiao No. 2, Jinjiao No. 3, No. 1 No. 2 Shenjiao, No. 1 No. 1 sweet pepper. 2 seed disinfection. Soaking with 10% sodium phosphate solution for 20 minutes, washing with water and soaking and germination. 3 cultivation management. The use of plastic film covering cultivation, so that early colonization, early results. 4 chemical control. Spray 20% of virus A wettable powder 500 times, 50% of bacteria clear 200 times, bacteria, grams of poison 200 grams of liquid and so on. Spray once every 10 days at the seedling stage or after planting, and control 3-4 times in a row. Tea-yellow glutinous rice: (1) Clear the weeds in the field and the litter in the fields, level the land, and destroy the overwintering sites to eliminate overwhelming insect sources. (2) It was found that the occurrence of this disease should be immediately controlled by the chemical. It can be used 15% fluorenone EC 300 times, 34% locust ricin EC 2000-2500 times, 48% LST 1000 times, 1.8% Ji Insect moth, 1.8% avermectin (Zeadin, Xinke, etc.) 3000x, 15% Qinling EC 1500x, 73% Kraft 2000x, 15% Broth Neoprene 2000x Liquid, 35% killing special emulsion oil 1000 times liquid and other agents for prevention and treatment. When spraying, focus on the young part of the upper part of the plant. For the production of pollution-free vegetables, diclofen must not be used when controlling aphids.
Tinplate (SPTE, tin-coated iron) is the common name of cold-rolled electroplated tin sheet, which refers to the cold-rolled low-carbon sheet steel or steel strip coated with commercial pure tin on both sides.
Characteristic advantage
1.Light permeability
In addition to triggering deterioration reactions in foods, light also causes changes in proteins and amino acids. The exposure of vitamin C to light makes it easier to interact with other food ingredients, resulting in a large loss. According to research and analysis, the loss of vitamin C in transparent glass bottles of milk is 14 times higher than that in dark bottles of milk, light will also cause milk to produce oxidative smell, as well as nuclide, methionine and other cracking and loss of nutritional value, tinplate can opaque light makes the highest preservation rate of vitamin C.
2.Good sealing
The barrier of packaging containers to air and other volatile gases is very important for the preservation of nutrients and sensory quality. The comparison of various juice packaging containers showed that the oxygen permeability of the container directly affected the Browning and vitamin C preservation of the juice. The preservation of vitamin C is better in metal cans, glass bottles, aluminum foil glue layers and cartons with low oxygen transmission rate, of which iron cans are the best.
3.Reduction of tin
The tin in the inner wall of the tin plate will interact with the oxygen remaining in the container during filling, reducing the chance of the food ingredients being oxidized. The reducing effect of tin has a good preservation effect on the flavor and color of light colored fruits and juices, so the juice cans filled with unpainted iron cans have better nutritional preservation than those filled with other packaging materials, and the Browning change is slight, the acceptance of flavor quality is better, and the storage period is extended.
Use
The application of tinplate is very wide, from as food and beverage packaging materials to grease cans, chemical cans and other miscellaneous cans, the advantages and characteristics of tinplate provide content in the physical and chemical properties of good protection.
Tinplate sheet,Tinned iron plate,cold rolled low carbon sheet steel,electroplated tin sheet steel
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