A reader from the Tongting District, Yancheng City, said: There are 5 mu of local muskmelon used to control rust and powdery mildew with 50% Propiconazole EC 2 ml plus 10 kg of water a week ago. Recently, the leaves have become thicker and more brittle and tender. The head is shriveled and the lower four leaves are yellow. Among them, 1 mu of melon is in seedling stage, and the remaining 4 mu of small canopy is cultivated in melon period. May 31 found that the above symptoms of melon, per mu with bicao 0.136% red. å² B. 芸薹 WP 2 g water 10 kg spray. He asked whether melons were harmed by propiconazole and sprayed with 0.136% red, hydrazine B, or WP.
In an interview with reporters on related issues, experts from Swiss Syngenta Crop Protection Co., Ltd. said that propiconazole can be used to control melon rust and powdery mildew, but care should be taken to avoid drug use during sensitive births. Melon seedlings and young larvae are sensitive to propiconazole and are prone to injury symptoms after spraying. After spraying propiconazole, thickening and brittleness of leaves, shrinkage of tender heads, yellowing of leaves, etc., should be caused by propiconazole. The use of propiconazole in melons should be controlled at the infertile birth period such as pre-flowering and melon ripening. Improper application of drugs such as excessive drug concentration can also cause phytotoxicity in melons. In the melon and other melon crops on the application of 50% propiconazole EC, generally should add water 6000-8000 times spray. Per acre with 50% propiconazole EC 2 ml water 10 kg spray, drug concentration is too large.
It is understood that propiconazole has a certain plant growth regulating activity, will inhibit the synthesis of gibberellin in plants, reduce the content of gibberellin and indole acetic acid, eliminate the top of the plant, make the stalk thicker, the plant dwarf is compact The content of chlorophyll, protein and nucleic acid increases. Therefore, when melon is harmed by propiconazole, it will show that the young tissue is hardened, brittle, easily broken, the leaves become thicker, the leaf color becomes darker, the plant growth is slower, dwarf, and tissue necrosis, chlorosis, perforation and other symptoms . There are differences in the degree of occurrence of phytotoxicity in different reproductive periods. Generally, phytotoxicity occurs easily in the seed germinating stage, the young shoot tipping period, the seedling vine extensional stage, the flowering stage, and the young nectarine stage, but it rarely occurs in other periods. The damage caused by phytotoxicity is also different in different periods. The impact at the seedling stage is small, and the flowering season and young fruit period have the greatest impact, which will reduce the production and quality.
After the meclolic propionazole occurred in the melon, spray and protect 0.136% of the red, å²B, and WP. The WP can relieve the symptoms of phytotoxicity to a certain extent and promote the recovery of the plant.
Many essential vitamins are needed in the diet every day. The fruit body of mushrooms is an excellent source of B-complex vitamins, including riboflavin (B2), nicotinic acid, pantothenic acid, thiamine (B1) biotin, folic acid, and vitamin B12. Mushrooms are a particularly rich source of riboflavin. And mushrooms are one of the best non-animal sources of niacin: 100 grams of fresh mushrooms provide more than a quarter of the vitamins an adult needs daily.
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