Fruit rust spot disease, also known as fruit rust, is a physiological disease of the fruit epidermis, which is mainly the result of a physiological protective reaction between epidermal cells and adversity.
In general, tree rust with strong tree, lush foliage and vigorous growth occurs lightly; trees with weak tree and small growth of new shoots have serious fruit rust. Under different cultivation management levels, fruit rust occurs to varying degrees. For example, in an orchard where flowering, winter irrigation and spring irrigation have been carried out, the fruit rust is light, and vice versa. In different ages, fruit rust on 5-6 year old saplings is more serious than large trees above 10 years old. At the same time, the degree of fruit rust occurs between different varieties.
The main symptoms of peel rust are rust spots and rust spots. Rust spots: also known as "skin", generally forming a layer of yellow-brown plaques with irregular shapes and different sizes on the fruit epidermis, mostly occurring in the crotch and crotch of the fruit; rust points are also called "fruit points" It is a yellow-brown spot centered on the stomata of the fruit epidermis. It is small like a needle tip, large like a pen tip, sometimes sparse, sometimes dense, and the entire fruit surface can occur.
Causes: (1) Cultivation measures. For example, the application of nitrogen fertilizer is uneven, the humidity is too large, and the density of the orchard is too large. (2) Close relationship with seasonal climatic conditions, such as temperature, moisture, and light. (3) Pesticide and harmful dust pollution and fruit surface. (4) Mechanical damage. The fruit is damaged by the external force rubbing or colliding with branches or other objects; the fruit surface is rusted when the fruit is thinned or the bag is scratched. (5) It is related to pests and diseases. Some pests and diseases that often occur in orchards can cause fruit rust on the fruit surface. According to the survey, the occurrence of powdery mildew in spring often causes the fruit surface to be unclean and form fruit rust.
Control measures: (1) Select resistant varieties. (2) Cultivate a reasonable tree type and reduce the humidity in the garden. (3) Eliminate pests and diseases in wintering places, reduce the number of insects and insects overwintering insects, reduce the pressure on pests and diseases of fruit trees during flowering and young fruit period, reduce the number of drugs used during this period, and avoid the frequency of fruit trees being too frequent, causing fruit rust. The game is 600~800 times. (4) Balanced fertilization, reasonable load; based on the application of organic fertilizer, formula fertilization according to the results of orchard; pay attention to the improvement of soil, nitrogen, phosphorus, potassium and its medium and trace element fertilizer application, strict thinning and thinning, Control the production to improve the quality and prevent the tree from weakening. (5) Rational use of chemical pesticides. (6) Fruit bagging.
Slip-on or called Plate-type flat welding flange is to open a few holes for fixing on circum of plate-shape of metal body. It is often used in connecting other things. It must be used in double. Use the bolt to connect two flanges. Industrial flanges include threaded connection (Wire connection) flange and welding flange. The flange is widely used in electric power, petroleum and natural gas, petrochemical, chemical industry, shipping, heat supply, paper-making and metallurgy etc.
Type: DIN2543,DIN2544,DIN2545
Pressure: PN16,PN25,PN40
Material: Carbon steel or other required material
Drawing and data show DIN2543, if you need other types, please contact with supplier.
How to order: DIN number + (size) (x d1 dimension if not ISO) + (pressure) + material if not steel
Example: for steel = DIN 2543 DN 100 PN 16 Example: for stainless = DIN 2543 DN 100 PN 16 316SS
Slip-On Flange,Slip-On Stainless Steel Flange,Slip-On Carbon Steel Flange,Pipe Flange
HEBEI ZIFENG NEW ENERGY TECHNOLOGY CO.,LTD. , http://www.zifengpipeline.com