In the spring, when the earth recovers, all kinds of pathogenic pests are about to become active. At this time, the prevention and control of pests and diseases should be based on prevention and prevention.
1. Prevent rot disease. From the beginning of March to the end of April, it is the first incidence peak of rot disease. It should be raided and scraped. For lesions that rot up to xylem, they must be scraped to the xylem. After the dirty skin has been scraped, it must be cleansed, and the good skin will be scraped to a width of 0.5-1 cm. The clean edges should be neat and smooth, and the scars should be diamond-shaped so as to prevent the old disease from recurring (the specific cure area is shown in the figure). Scraped spots are timely treated with antiseptic protection, and the diseased skin scraped off immediately burns out in the orchard. Commonly used disinfectants include rot and other substances. In addition, for seriously ill trees, when the sap flows, bridges are required to restore the tree vigor. Bridging method: After the rot of the rot disease is cured, a “⊥†shaped mouth is carved at 3-4 cm above the lesion, and a “T†shape is carved under the sickle and deep to the xylem. Cut a one-year-old strong shoot (also can use other varieties of robust shoots), according to the length of the lesion need to be cut off a certain length, in both sides of the shoot on both sides of the same surface cut a horse-shaped slope, and then insert the top end of the "⊥"-shaped mouth Insert the lower end into the “Tâ€-shaped mouth. The cutting is preferably slightly arched to make it firm. Then a small nail is nailed on the inclined surface of the branch, and the prepared wax or other viscous material suitable for grafting is painted on. At the incision, moisture is evaporated to ensure the survival rate. Large trees can bridge several spots.
2. Clean up the orchard. In early March, scrape off old rough bark, lift grass ropes, sweep away weeds and fallen leaves, eliminate all kinds of overwintering germs (ring rot, anthrax, early defoliation) and pests (hawthorn spiders, red spider mites, etc.) . Pay attention not to scratch the bark too much, focus on the rough old bark below the three main branches. Clean up the rough and fallen leaves to take them out of the park and burn them or bury them deeply. Don't throw them away.
3. Diagnosis and treatment of deficiency syndrome. In the middle and late March, the orchards in thin mountainous, beach, and saline-alkali lands are prone to deficiency of the disease, yellow-leaf disease can be sprayed on the branches and sprayed with 0.3%-0.5% ferrous sulfate solution, and sand and mountain orchards can also be combined. Basal ferrous sulfate (500 g per tree) was used as the base fertilizer. For fruit trees with severe fruit deficiencies, 150-200 g borax can be applied to each plant (big tree) at the time of application of the basal fertilizer. For fruit trees with severe lobular disease, 3%-5% zinc sulfate solution may be sprayed before germination, or 1% zinc sulfate solution may be sprayed when the inflorescence is reddish, or combined with fertilization. 500-1000 g of zinc sulfate may be applied to each large tree root. Small trees reduce it. For the above three kinds of fertilizers, the root method is not suitable for saline orchard orchards.
4. Prevention of rot disease. In late March, the orchard with rot disease should pay attention to rooting roots, remove the roots, and sterilize the soil. The soil around the diseased roots was taken out of the garden. The diseased spot was disinfected with 40% formaldehyde 100 times solution or 150 times solution of sodium pentachlorophenol. The diseased trees had to be rooted. Before the rainy season, they were scattered into the plant ash or lime and buried in a mound. It cannot hold water.
5. Prevention and treatment of severe disease parks. In late March, the diseased orchard should be sprayed with 3-5 Baume degree lime sulfur. Combined with control of overwintering pests such as scale insects, it is also possible to spray 95% oil emulsion 50 times. For a serious single plant tumor can also be used 40% Dimethoate emulsion 2-5 times the water, in the trunk about 30 cm away from the ground to scrape the old rough skin 10 cm, coated 6-10 cm ring, and then use Old newspapers are bandaged.
Application fields of flood control woven bags:
1. It is used for flood control, emergency rescue, dike loophole overflow and emergency protection, temporary heightening of flood control dike, construction of temporary waterproof siege, seepage and landslide of reservoirs and river levees, slope protection and erosion prevention, project closure, and blockage of underground ditches and tunnels;
2. It is used for drainage of warehouses, courtyards, ditches and ponds, and flooded farmland.
3. It is used to prevent falling water in factories, tunnels, underground parking lots, subways and other fields that are prone to flooding.
4. It is used for road construction, site bridge construction, competition site and other ponding places to absorb water.
5. Industrial and mining enterprises that need rapid water drainage such as mines and oil and gas field exploitation, etc
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