In the summer, citrus growth is in the first and second stage of physiological fruit drop. The contradiction between the summer shoots and fruiting and fruiting is particularly prominent. At the same time, various kinds of overwintering insects are hatched one after another. It is the period when the first generation of larvae is most concentrated. In the summer, the main measures for the cultivation of citrus are the top-keeping fruit, the top-dressing fruit fertilizer, and pest control. A row of fruit With high temperatures and heavy rain in summer, citrus can easily attract a lot of summer shoots, consume large amounts of nutrients, and aggravate the second physiological fruit drop. If it is allowed to grow in summer shoots, it may result in reduced yield or even no harvest. Therefore, the summer shoots are the most effective Measures, generally speaking, the young trees entering the result period, due to less fruiting, strong tree vigor and more summer shoots, but also pay attention to timely wipe tip, when the summer shoot length 7 ~ 10cm all erased from the base, interval 5 Wipe again in ~7 days and wipe it again in early August. Into the fruit period of the tree, or more fruit trees, summer shoots a small number of students, but also promptly wipe buds, to late July, and then put autumn shoots, lay the foundation for stable production next year. Second, chase strong fruit fertilizer In late June, the second physiological fruiting of citrus was basically over. The number of fruit bearing per plant was basically determined. The fruit was transferred to the inflated growth period and required a lot of water and nutrients. The fruit fertilizer must be applied in a timely manner. The compound fertilizer containing potassium sulfate was The best, more than ten years of trees or the results of more than 400, each plant 2 pounds, young trees or trees with less results depending on the age and the amount of results, but also can choose 50 kg of soil fertilizer, urea half a catty, too Calcium phosphate half a catty. Early maturing varieties are available from late June to early July, mid-late maturing varieties are performed in the middle and early July, and the side of the crown is made. The digging depth is 30cm, width is 20cm, and the length is 100 to 120cm. Topsoil and fertilizer are mixed together. . Weeds are buried in the bottom of the tree tray, and then the heart and soil are backfilled. Do not use it. Third, pest control May is the period when the first generation larvae of citrus insects, whiteflies, and spider mites come into being. It is necessary to pay close attention to patting both sides of the leaves. If there are more than two red spots on the hands, it is necessary to fight drugs promptly. 73% Ketite 2500 times or 5% Nisolut EC 2000 times, for scale insects, black locust whitefly with 40% sterilized milk 1500 times or 25% buprofezin WP 2000 times. The period from May to July is the spawning period of Tianniu. One is to kill adult insects in time; the other is to use lime to brush the trunk and refuse to resist spawning; the third is to inspect the trunk area in time and once wet or sawdust is found, use iron wire first. Kill the larvae and fill the hole with poison cotton. From June to July, it is the key time for preventing and controlling rust infestation, especially for orange groves that have had this worm in the early years. To use 15% of broom net emulsion 2000 times or 73% of chlorella 2500 times.
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