Affected by the recent rainy weather, the aubergine disease of the open field eggplant is generally 20%-30% , and the loss can be more than 50% when the disease occurs .
symptom
Seedling stage: The base of the embryo stem is water-stained, which develops very quickly, often stumbles, causing the seedling to die.
Adult stage: Generally, the disease occurs first on the fruit close to the ground. At the beginning of the disease, round brown lesions are produced, which gradually enlarge and are slightly depressed, and the inside of the fruit becomes black and rot. When the weather is wet, the disease minister has dense white wool. The incidence of the leaves starts from the edge of the leaf tip or the leaf. The lesion is dark green at first, and then turns brown, which is irregular. When wet, the diseased part is also sparsely white. The shoots are sick, initially watery, then brown, contracted to break, and the upper branches are wilting.
Law of onset
Eggplant plague often occurs in hot and rainy seasons. High temperature and rain during the fruiting period are also beneficial. The rainy season is early and the rainfall is heavy, especially the rainy weather and the sultry weather. The incidence is early and heavy. Low terrain, soil viscosity, easy accumulation of water in the field after rain, excessive dense planting, poor ventilation, easy to cause disease.
Control method
Agricultural control: selection of disease-resistant varieties; rotation with crops other than solanaceae vegetables and melons for more than 3 years; selection of easy-to-drainage plots, application of organic fertilizers and phosphorus-potassium fertilizers, and high-ridge cultivation, east-west direction, do Easy to irrigate; rationally close planting, timely remove the foot and leaf, so that the field is ventilated, the rotten fruit and diseased leaves in the field should be cleaned up and burned or buried deeply; the base fertilizer should be applied, the fertilizer should be applied in time, and the phosphorus and potassium fertilizer should be added to avoid partiality. Apply nitrogen fertilizer.
Physical control: Soak seeds in warm water at 55 °C for 15 minutes or warm water at 50 °C for 30 minutes.
1 Soak the seeds with 300 times of formalin solution for 15 minutes, wash with water and sown.
2 In the seedling stage, 75% chlorothalonil wettable powder 600 times solution, or 40% ethyl phosphorus aluminum wettable powder 200 times solution, or 65% sensible zinc wettable powder 500 times solution. Spray once every 7 days for 2-3 times.
3 When the tomato seedlings are planted, use 70% thiophanate-methyl WP 1 to 100 to form a medicinal soil, apply 1100-1500 kg of soil per acre or ditch .
4 Before the onset , the roots were filled with 25% metalaxyl WP 500 times, and each seedling was filled with 150 ml, once every 10 days.
5 spraying in the early stage of the disease, commonly used pesticides have spray ( 80% mancozeb) wettable powder 600 times liquid, or 72% grams of dew ( 64% mancozeb 8% cream urea cyanide) wettable powder 800 times Liquid, or 69% Anke Mn-Zn wettable powder 900 times solution, or 58% metalaxyl manganese zinc 400-500 times liquid. In order to prevent the formation of drug resistance, the drug can be rotated.
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Butt welded pipe fittings are the most widely used pipe fittings. It is made of high-quality steel pipe and is formed by heating or pressing. Carbon steel pipe fittings are divided into carbon steel elbow, carbon steel tee, carbon steel cross, carbon steel reducer (large and small head), carbon steel head (cap) 5 series. The main implementation standards include GB, DIN, ASME, JIS, GOST. The biggest use of carbon steel pipe fittings is to connect pipes, Valves, pumps and other equipment to form a complete piping system.
When using, the pipe fittings are evenly welded with the flange or directly with the pipeline, so that the entire pipeline is integrated and starts to work normally.
Pipe fittings are widely used in water, beverage, beer, food, petrochemical, nuclear power, machinery, medical equipment, fertilizer, shipbuilding, waterproofing and other pipeline systems. It is the most widely used pipe fittings in the piping system and equipment of machinery, petroleum, chemical industry, water conservancy, electric power, shipbuilding, air conditioning and other departments. The tube cap is also the end cap on the pressure vessel, which is a main pressure-bearing component of the pressure vessel. The quality of the cap is directly related to the long-term safe and reliable operation of the pressure vessel.
Types of butt welded fittings:
According to the model can be divided into: ANSI B16.9 ANSI B16.28 JIS B2311SGP DIN 2605, DIN2615 DIN2616 DIN2617
According to the shape, it can be divided into: elbow, tee, cross,
Reducer (large and small head), head (cap)
According to the thickness can be divided into: SCH 10 SCH20 SCH30 STD SCH40 XS SCH80 XXS
According to the process, it can be divided into: stamping, pushing
According to the material can be divided into: carbon steel, stainless steel, alloy steel
1: Put the high-quality steel pipe, the raw materials according to the required size, and put it into the ring-shaped intermediate frequency furnace to heat and push to form or place it on the mold and extrude it by the press.
2: Pass the shaped elbow blank through the special CNC lathe for pipe fittings according to the drawing. Welding groove processing is performed on the two ends of the elbow blank, with a certain angle and a certain edge, and the angle and deviation range are strictly in accordance with the requirements of the drawings.
3: Put the elbow blank after shaping and beveling, and put it into the shot blasting machine for shot blasting on the surface of the pipe to remove the oxide skin on the inner and outer surfaces.
4: The finished pipe fittings are inspected according to the requirements of the drawings for the thickness and radius of curvature and straightness.
5: The pipe fittings that have passed the inspection will be typed on the end face according to the customer's requirements, and the pipe caps will be treated with anti-rust treatment according to the customer's requirements, and then put into wooden boxes or wooden pallets for transportation.
Standard for butt welded pipe fittings: ANSI B16.9 ANSI B16.28 JIS B2311 SGP DIN 2605, DIN2615 DIN2616 DIN2617
Thickness of pipe fittings: SCH 10 SCH20 SCH30 STD SCH40 XS SCH80 XXS
Size of butt welded fittings: 1/2"-48" (DN15-DN1200)
Steel Fitting,Stainless Steel Fittings,Ss Fittings,Stainless Fittings
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