Pay attention to the management before and after the sprouting of fruit trees
In November 2009, heavy snow fell suddenly in most parts of northern China, and many fruit trees suffered various degrees of cold damage. After investigation, flower buds were frozen in all varieties of pears, but there was no significant impact on yield. In the peach trees, the type of Kubuki-based varieties was lighter and the apple was more heavily frozen; all varieties in apple trees were heavy; It is heavier when it is frozen, and it has a great influence on the output. Early frost damage will cause the fruit trees to weaken, and the resistance will decline. This will have an adverse effect on all growth and development activities such as budding, flowering, fruit setting, and long-leaved branches and leaves in spring this year. If the cold weather occurs again, it will worsen the fruit trees. To ensure the normal growth and fruiting of fruit trees, the following recommendations are proposed for reference by farmers.
First, before germination
1. Strengthen water and fertilizer management, promote robustness, and increase resistance. In particular, unfertilized orchards in autumn should be carried out as soon as possible, and fertilizers should be applied immediately after the soil is thawed. Fertilizer is dominated by organic fertilizers, with a certain amount of NPK fertilizer and ecological bacterial fertilizer. This will not only reduce the amount of fertilizer, but also promote nutrient conversion, improve the soil and promote root absorption. Immediately after the fertilization, water should be poured, especially in the orchards that have not been frozen in autumn, and watering should be done early in the spring.
2. Dried sticks to add nutrition. Before germination, use 1% urea + 1% potassium dihydrogen phosphate + 600-1000 times the "Tatara 2116", or 500 ~ 1000 times the "You Chocine" (NPK fertilizer foliar fertilizer) + 600 ~1000 times the "Tianda 2116", evenly sprayed on the branches, with no dripping is appropriate, the interval of 5 to 7 days and then spray once, and even spray 2 to 3 times. For trees with lobular disease, 1% urea + 3% zinc fertilizer, or 600 - 1000 times "Tianda 2116" + 3% zinc sulfate fertilizer solution can be sprayed for 2 to 3 times.
3. Clean up the orchard and reduce the number of pests and worms. Lay out the dead leaves in the park or bring them out of the park and burn it in a concentrated manner. Make sure that the branch diseases such as rotten disease and rotenia are seriously scraped at the right time (skins are peeled off to prevent redness), and the healing agent is applied. It not only promotes the healing of the lesions, but also kills the germs.
4. Different pruning dates for different tree species are different. The order is first pear tree, followed by peach tree, and third is apple tree. In particular, the task of cutting apple trees in winter must be completed in two steps. It is necessary to remove large branches and dense branches that have no effect on the light, and then cut them again before flowering to ensure a certain amount of production.
5. Tree spatula remover to reduce the base number of pests. Before germination, spray 3 to 5 Baume degrees of "lithium sulfur" + 200 times of "pentachlorophenol sodium", or spray 3 to 5 Baume degrees of "lithium sulfur" + 1500 times. "Air defense" can also be used for 6000 times liquid "star" + 1500 times liquid "air defense", or 1000 times liquid "Fuyong Kang" + 1500 times liquid "air defense" for pear wood worm, tenebrio molitor, blind stink bug The wintering eggs of other pests, the overwintering adults of red-and-white spiders, and all overwintering germs have a killing effect. Can also be used 6000 times the "Star" jets, killing all bacteria is very good, especially the control of the bollworm disease of the trunk is very prominent.
Second, before budding flowering
1. Pay attention to late spring. Before the cold and freezing damage comes, the orchard can be smoked or the whole tree can be sprayed with “Tianda 2116†with 300 to 600 times of liquid 3 to 5 days before the onset of frost damage.
2. Use of nutritional remedies after frost damage. First, spray 1000 times liquid "Tianda 2116", can also be combined with insecticide acaricide mixed spray; Second, foliar spray of 500 times the solution of "constantin" + "polyboron", or spray 300 times Liquid "urea" + 300 times the "potassium dihydrogen phosphate" + 1000 times the boron fertilizer + sugar, if there is lobular disease can be sprayed with 0.3% sulphate zinc fertilizer solution; third is the trunk coating nutrition, with 20 times Liquid "Tianda 2116" or amino acid leaf fertilizer has a good effect.
3. After germination and during the separation of floral dots, the "star" or 1000 times solution of "10% polymyxin", 25% "carbendazim" 500 times solution, 70% "methyltoluene" can be used for 6000 times solution. Bujin “800 times liquid + “Golden Red Triangle†3000 times liquid or chlorpyrifos 1500 times liquid, “air defense†1500 times liquid sprayed tree, for apple mold heart disease, rosy ring disease, black spot disease, black spot and blind spot The pest and disease killing effect is very good.
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