Strengthen the management of plum trees in early summer to ensure high quality and high yield of plums

Although plum is a kind of fruit tree with high yield and strong disease resistance, due to poor management in early summer, the phenomenon of big and small years is serious, the fruit is small, and the quality can not be guaranteed. The plum trees in the full fruiting period are mainly short fruit branches and flower-shaped fruit branches. at present, the plum fruit is in the fruit expansion stage, in order to increase the fruit, ensure the uniform size of the fruit, improve the fruit quality and prevent the big and small years, we should strengthen the management of fertilizer and water, fruit thinning and pest control. Plum fruit expansion period needs a lot of nutrients and water to promote fruit development. The strong fruit fertilizer should be applied to the strong adult trees at the beginning of May, while the plum trees with weak trees should be added another topdressing, and the compound fertilizer and plant ash with high potassium content should be used as topdressing, ditch depth 10cm, ditch width 15cm, compound fertilizer 1.0kg to 1.5kg per plant, and covering soil in time after fertilization. In case of drought, irrigation should be carried out during the expansion period of young fruit, and fruit thinning should be carried out at the end of physiological fruit drop, when the size of fruit is obvious, first of all, small fruit, dense fruit, crooked fruit, diseased fruit and so on should be removed. According to the size of fruit shape, it is appropriate not to influence each other and staggered growth. In general, one fruit is retained every 5 to 8 cm on fruit branches, and the yield per mu is controlled at 1000~1500kg. Gummy disease is a common disease on plum trees, and the occurrence peak is from May to August of the year. We should take strengthening the tree potential as the center, strengthen the drainage of the orchard, increase the application of organic fertilizer, improve the disease resistance of the tree, control the branch diseases and insect pests in time, reduce the diseases and insect pests, scrape off the glue part, then smear 5 Baomedushi sulfur mixture, and finally apply the protective agent. it has a better effect. At the same time, strengthen the control of longicorn beetles, if the fecal holes of longicorn beetle larvae are found in the trunk, they should be removed immediately.