Citrus Garden Summer Management
In summer, citrus fruit enters the expansion period, requiring large amounts of fertilizer and water, and also high temperatures, little rain, and dry seasons. This is the peak of citrus diseases and insect pests. Therefore, it is necessary to strengthen the management of summer citrus groves. The use of sufficient fertilizing material to promote fruit tree-fruit citrus fruit during the expansion period, the strong suction of roots, apply enough fertilizer, can promote the tree strong fruit, reduce fruit drop. According to the practice of fruit growers, fertilizers should be delayed and fertilizers should be applied. Each tree should be distributed according to the age of the trees and the amount of the results. 20 to 25 kg of livestock and poultry manure, 1 to 15 kg of cake fertilizer, 0.5 to 1 kg of superphosphate or bone meal, and fast-acting fertilizer. Appropriately apply 25 to 50 kg of anaerobic manure water 15 days before sprouting, and add 0.5 to 1 kg of cake fat and 150 to 250 g of urea to the cake. The tree of the result should be applied 1 to 2 extra-root fertilizers. The spraying of foliar with 0.2% urea and 0.2% potassium dihydrogen phosphate showed that the symptoms of deficiency in new leaves should be sprayed and what should be lacked. In hot and dry conditions, spray of hormones can also promote root cell division. Increasing absorption capacity has a certain effect on preventing fruit drop. Strengthen Water Management Drought Resistance and Cooling The mountain orchards need to refurbish irrigation and drainage systems, reinforce the walls, clear the drains, prevent rainstorms, and protect soil and water from erosion. At the same time, we must do a good job of drought relief and temperature reduction to prevent high-temperature fruit drop. When citrus grows at more than 35°C, photosynthesis is weakened and physiological function is hindered. Therefore, when the orange leaves begin to curl up in the hot season, they must divert water to the park and use water to adjust temperature and humidity. Conditionally available sprinkler irrigation, and cultivating loose soil in the cultivator, improve water retention and fertility, improve the orchard's microclimate, reduce fruit drop, and promote strong results. In the heat of high temperature and drought, cover the orchard ground with grass, reduce direct sunlight and water evaporation, and reduce the surface soil temperature to protect the root groups, enhance root activity, and reduce the fruit drop rate. In addition to the summer shoots, the summer shoots must be removed and the summer shoots must be wiped out. The requirements must be wiped before the autumn shoots are released to reduce the consumption of nutrients and ensure the autumn shoots are robust. For old trees, trees with large amount of results, autumn shoots should be put early; young trees, low-yielding trees, and empty trees can be a little later; general requirements should be released from late July to mid-August, sweet oranges should be put in August. Tip is appropriate. Insect pest prevention promotes high yield and high quality. From July to August, citrus fruit is enlarged and susceptible to damage by fruit-feeding tobacco moths, often resulting in a large number of fruit drop; when rust occurs, it causes fallen leaves, and the fruit turns purple-brown; red spider causes mandarin oranges Orange trees grow atrophic, and deciduous orange branches make the leaves white-gray; leafminers harm new shoots, and larvae feed under the epidermis of young leaves, causing severe leaf curling and affecting growth. In this regard, in addition to strengthening soil management, regular irrigation is needed to protect trees. In the case of rust wall niches, 80% zeocin can be used 600 times, or diclofen 500 times; phyllite moth can be used 50% dichlorvos 800 times or 90% dipterex 1000 times with 0.2 degrees lime sulfur Spraying prevention and control; before and after August is often the peak period of the fruit sucking fruitworm, it should be grasped before and after the occurrence of timely prevention and treatment, can remove wild plants inside and outside the orchard, artificial killing at the hot night, the effect is better. Diseases mainly include ulcer disease, scab disease, and anthrax disease. If a disease occurs, use a 1:1:100 Bordeaux mixture, or 50% carbendazim or thiophanate-xylene 800 times for spraying, or use a 50% tetromycin 600-fold for spraying.
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