Rice blast is one of the most important diseases in rice. The northern part is most prominent in the stem stalk. During the growth period of rice, all parts of the plant can be affected, which is a fungal disease. Due to the different damage period and location, it is divided into nursery, leafhopper, thrift, panicle neck and grain mites. Its occurrence is characterized by the fact that the bacteria are overwintering on the diseased straw and diseased valleys with hyphae and conidia.
I. Hazard symptoms 1. The nursery mainly occurs on the leaves of the seedling stage, forming brown, fusiform or amorphous lesions, sometimes forming a gray-green mold layer on the lesions.
2. Leaf mites generally occur after the tillering period. Common typical lesions, fusiform.
3. Frugality occurs mostly in the first to second nodes under the flag leaf. It is initially dark brown and small, gradually expanding. The lesion can surround part or all of the knot, making the knot black, and the disease is shrinking and sag. The rice plant is broken and lodging, which affects the fruiting, grouting, and even the formation of white ear.
4. The neck scorpion occurs on the neck, cob, and branch. The lesion is dark brown at the beginning, and then expands up and down to form dark brown streaks. The lighter affects the firmness, the paddle and even the granules. The white ear is formed and it is not strong.
Second, prevention and treatment methods 1, rational fertilization, increase the application of organic fertilizer, phosphorus and potassium fertilizer;
2, scientific water, avoid deep water flooding, keep the field moist, even pay attention to clear ditch drainage in rainy days;
3, 70% methyl thiophanate WP, 70 g / mu in the early stage of the disease or from the ear formation period to the booting stage, 50 kg of water spray.
4, Sui 瘟 should focus on the protection at the heading stage, 2 to 3 days before the break, 40% of the Fuji No. 1 emulsifiable milk 75-100 ml or 75% tricyclazole 30 grams of water 50-75 kg spray per acre, 7 After 10 days, take the medicine again according to the weather conditions.
Pyrite as Fillers Used in Grinding Wheels/ Abrasive Tools
Ablation grinding wheel / abrasive( filling agent )
PYRITE__As fillers used in grinding wheels/ abrasive tools
Place of Origin: Henan Luoyang, China
Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder.
Product Description
Detailed introduction: is filling agent for ablating grinding wheel abrasive, which can effectively reduce the grinding wheel temperature during ablation, improve the heat resistance, and prolong the service life of the grinding wheel.
Formation of a protective layer
(1)The reaction absorbing oxygen occurs between 400 and 475 degrees, thereby reducing the oxidation of resin, reducing the oxidation burn of workpieces, and prolonging the working life of grinding wheels at high temperature.
4 FeS2 + 11 O2→2 Fe2O3 + 8 SO2
(2) 4 FeS + 7 O2→4 Fe2O3 + 4 SO2
400-475 degrees is a limit that the grinding wheel can easily reach. The above reaction creates an oxygen-free and hypoxic environment for the grinding wheel at the micro level, thereby improving the high-temperature performance of the grinding wheel.
Decomposition reaction occurs at 650-degree heat absorption, thereby reducing the working temperature of the grinding wheels.
FeS2→FeS + S
(3) It enters the melting state at about 1100 degrees, which becomes a good lubricant to protect the grinding wheel FeS(s)→FeS(l).
(4)Sulfur, sulfur dioxide and sulfur trioxide react with the workpiece surface to form FexSy:
Quality:
S: 48%min, FE: 42%min, SIO2: 3.0%max, PB: 0.1%max,
ZN: 0.1%max, AS: 0.1%max, . C: 0.3%max, CU: 0.2%max,
H20: 1.0%max, SIZE: 95%min
Granularity: (0-3)mm/(3-8)mm/(3-15)mm/(15-50)mm or other particle size.
Packing: 25KG/500KG/1000KG/BAG or 1000KG/BAG or other packaging.
Note: if there are special requirements, the product can be customized according to clients` requirements.
Iron Sulphide For Resin Grinding Wheel---LHT(SL)
Iron sulphide for resin grinding wheel Pyrite, Iron pyrites, pyrites lump, Ferro sulphur, Pyrites powder
LUOYANG PERFECT TRADING CO.LTD, , https://www.pyritefes.com