Most of the varieties of bee plums in the flowering period have self-infested phenomenon. What are the ways to improve the fruit setting rate of plum planting? Let's take a look at it. 1 regulation of the growth of plums For trees with excessive tree height, it is necessary to smear and trim the erect branches in time, and open the branches in time; or apply 15% paclobutrazol 3~5g in autumn or spring, or 150~200 times paclobutrazol or PBO after falling flowers. For trees that are too weak, they should be applied after the fruit is harvested, and the fertilizers and fertilizers should be applied in time. 2 pollination of plum planting 2.1 Matching pollination trees with pollination trees When planting gardens, the pollination trees should not be less than 30%, especially for varieties with low self-cultivation rate or low pollen count. 2.2 Before the bee is flowering, release 1 box of bees per 0.1~0.2hm2 orchard, or release 200 heads of wall bees every 666m2. 2.3 artificially assisted pollination and flowering period, using chicken feather tweezers or towel sticks, gently rolling between the main varieties and pollinating varieties of flowers; or mixing the collected pollen and talcum powder in a 1:1, into the bag, Yu Sheng During the flowering period, the pollination is carried out on the main planting tree; the flowering branch can also be inserted into the water bottle and hung on the main plant tree. In addition, the flowering period 300-500 times borax plus 100 times granulated sugar or brown sugar can increase the fruit setting rate. 3 plum planting to prevent flowering freeze damage 3.1 Creating a windbreak forest In the north and west sides of the orchard, a windbreak forest is constructed. The windbreak forest is best to adopt a mixed irrigation mode to form a dense windproof wall below 1 m to reduce frost damage. 3.2 Pay attention to the low-lying land in the low-lying area to accumulate cold air, which will increase the freezing damage. Therefore, try not to build a garden in a low-lying area. 3.3 When the fumigation is near the flowering period, pay attention to listening to (watching) the weather forecast. When the freezing damage occurs at night, you can prepare the firewood or the smoke agent in advance in the orchard, and put a pile every 20m. When the temperature drops to 0. Smoke is started below °C. Note that the smoke pile should be 10m away from the tree, and there must be a special guard to prevent the open fire from burning the trees. Smoke is more effective in preventing flushing frost. 3.4 Irrigation Conditional sprinkler irrigation facilities can be used to spray the trees intermittently on frosty nights. Or under the tree, it has a good effect on reducing radiation frost. 3.5 Postponing the flowering period One is in the flower bud expansion period of Lishu. The tree sprays 500-2000mg/L chlorophyll, or 1%~2% lime water, which can delay flowering for 3~5d. Second, in the early spring and February, the top is irrigated, and after the surface is frozen, the wheat grass is covered under the tree, and the flowering can be delayed for 3 to 5 days. In addition, in winter, the degree of pruning is increased, and the summer topping is carried out, and the secondary shoots are cultured 2 to 3 times to form fruit branches, so that the flower bud germination period can be delayed, and the frost can be avoided. 3.6 Close planting and dense planting can increase the group's ability to resist freezing. Because the cold air sinks, the flower buds below 1m are susceptible to freezing damage. Therefore, the trunk stays slightly higher, which can alleviate the freezing damage of the lower layer cold air to the flower buds. 3.7 Variety selection Choose varieties that bloom late or are more resistant to freezing. 4 plum planting control Lishi bee At the end of the flowering stage, the crown is sprayed once and 1500 times for 1500 times or 1500 to 2000 times for pyrethroid. After one week, it is sprayed once again, which can basically control the damage. Li Shi bee took 1 generation in 1 year, and wintered in the soil under the tree. At the end of the flowering stage, 500 times of lasin or phoxim powder was sprayed on the ground. Pick up the insects that have fallen off the ground and remove them from the orchard to destroy most of the plum bees. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone Magnetic Bead Acid Nucleic Extraction Kit
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