Soybean root pests and diseases mainly include cyst nematode, root rot, root larvae, black velvet golden tortoise, and ground tiger. The control methods are as follows:
Agronomic measures: do a good job of changing soybean varieties, avoid long-term planting of single varieties, improve soybean disease resistance and insect resistance; promote mechanized seed selection to remove diseased grains, insects, weed seeds, impurities, and reduce pests and diseases. Opportunity; suitable sowing, according to the occurrence of pests and diseases in various places; adopt the method of early sowing or postponing sowing to achieve the purpose of avoiding diseases and avoiding insects; early tillage, fine land preparation, try to remove sick bodies and reduce the chance of wintering of pests.
Chemical control for cyanobacteria and root sorghum plots to take 5% phorate (II), with the "three ridge cultivation" sowing method with the seed fertilizer to the ground; can also use seed coating agent, according to the drug ratio of 1:75 Coating. 35% methylthiophosphorus, 35% ethylthiophosphorus, seed dressing 0.5% seed, wherein 5% phorate can also treat two leaf beetles, thrips, spider mites and other seedling pests. The above method can also be applied to soybean black velvet golden tortoise shell and ground tiger; in the root rot heavy plot, 50% Dufu mixture is used, and seed dressing is 0.5% seed dressing; in the root pest and disease mixed area, insecticide can be taken. Mixtures of fungicides.
Silicon Carbide fine powder is a type of the silicon carbide, which has Silicon Carbide Sand and silicon carbide particle size. According to different sizes to devide different mesh. The size generally divided into 8 # -320 #, the larger the model, the finer the particle size. Generally referred the size than 320 # as Silicon Carbide Powder. Silicon carbide particle size sand is divided into black and green two kinds, which are the ideal abrasive, mainly used for polishing, making grinding wheel, cutting sheet and other abrasive industry.
Black and Green Silicon Carbide has high purity, hardness characteristics. It mainly used in abrasive, refractory and electronic industries. The particle size has 0-10mm, 0-20mm, 0-50mm, 1-3mm, 3-5mm, 5-8mm, 1-10mm and so on.
The silicon carbide with high hardness, chemical stability and toughness characteristics, so silicon carbide mainly used to manufacture bonded abrasive, coated abrasive and free grinding. Using this raw materials to process the glass, ceramics, stone, Cast iron and some non-ferrous metals, hard alloys, titanium, high-speed steel cutting tools and grinding wheels.
Each Grain size and packaging can be processed according to customer`s requirements.
Silicon Carbide Fine Powder,Wear-Resistant Silicon Carbide Fine Powder,Corrosion-Resistant Silicon Carbide Fine Powder
Ningxia XingKai Silicon Industry Co., Ltd. , http://www.xingkaisic.com