Lotus root spoilage disease is also called blight, which is mainly caused by underground stems. When the disease is serious, the whole field is burnt.
Control method: agricultural control. Reasonable rotation is the most effective method to prevent and treat this disease. The rotation cycle is generally 2-3 years. Pay attention to the selection of healthy plants from the disease-free fields to prevent the spread of bacteria. Rational fertilization, not biased with nitrogen fertilizer, enhance plant disease resistance.
Chemical control. Before planting, use new high-fat film + targeted fungicide spray to smother, cover the agricultural film for 24 hours, dry and plant. In the early stage of the disease, mix with 30 kg of new high-fat film and soil, then sprinkle it into shallow paddy fields, spray once every 7-10 days, even spray 2-3 times.
More pesticide knowledge , please pay attention to China Pesticide Network
Tapered roller bearings are used in a variety of industrial applications. The tapered rollers allow the bearings to accommodate heavy radial, axial and combination loads. This loading flexibility combined with a variety of configurations can be designed from single cups, double cups, and cones. This is why tapered roller bearings are designed into almost every industry, particularly large diameter tapered roller bearings.
Tapered roller bearings are uniquely designed to manage both thrust and radial loads. Consisting of a "tapered cup" and a "tapered cone", this design is one of the most basic and common styles in the bearing industry. Found in everything from cars to conveyor lines, tapered roller bearings are more versatile than any other bearing series. Our taper bearings are sold in sets with both the cup and the cone together.
tapered roller bearings are designed for the most demanding applications in industries such as mining, forestry and steel manufacturing. Utilizing conical rollers and raceways arranged so that the rollers and raceways meet at a common apex, NTN`s tapered Roller Bearing rollers are guided by contact between the large end of the roller, providing high capacity for radial and single thrust loads. With almost 100 million tapered roller bearings manufactured every year under the NTN and Bower brands, it`s no wonder that NTN rivals all major competitors on the market.
We offer premium tapered roller bearings under the NTN and Bower® brand names. Most NTN and all Bower® tapered roller bearings feature case-carburized components. Cups, cones, and rollers are made from case-hardened alloy steel of [Bearing Quality" to provide superior fatigue life and reliability. Precise control of heat treatment, dimensions, and surface finish of the components further contribute to reliable bearing performance. So whether you`re looking for an American-made, case-carburized inch series taper, or a metric series through-hardened variety, we have you covered with a proper fit for your application. Premium steels and heat treatments are also available for applications requiring extended life and high reliability.
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Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearings.com