In August, oranges entered the period of autumn shoots and fruit enlargement period. The quality of management has a great influence on the yield and quality of citrus this year. Farmers should do a good job in the cultivation and management of orange trees. When the temperature of soil and fertilizer water management is above 37°C, if the citrus leaves appear wilting before the noon or the leaves do not recover at the next morning, they shall be promptly sprayed or sprayed in the morning and evening to supplement the moisture of the trees. For young orchards with low canopy coverage, soil temperature can be reduced and water evaporation can be reduced by means of tree trays, buried summer green manure, covered shade nets, and shallow ditch irrigation. Cut off the roots of the young trees that are not prosperous and have a good age. Dig a root-streaked groove on both sides of the canopy. The length of the ditch is 70 cm and the depth is 30-50 cm (based on the ability to cut off the root system). Green manure 5 kilograms, urea 0.1 kilograms, superphosphate 0.3 kilograms, and 2 kilograms of manure and livestock manure mixed with water, filled with soil. On the opposite sides of the following year, the roots were cut in the same way until the normal result of the orange trees. August is a season in which typhoons occur frequently in our province. Pay attention to repairing the orange orchard ditches and drain them. The film covering of hills and slopes can be carried out in the middle or late August. The orange orchard that is deep in soil and soil is not easy to dry can be covered with film after drying for 1 week; the soil layer is shallow and the orange groves are easier to dry after rain Film. Canopy management is prone to sun-burning orchards, which can spray 2% lime milk, or paste light-colored paper on the sunlit surface of the crown to reduce sunburn. As a result, more fruit orchards should be properly shredded in order to reduce their annual and annual results. Precocious Satsuma mandarin from the late August to mid-October, every 20-30 days spray once 2% calcium carbonate or 1% with calcium carbonate spray twice a week, you can reduce the occurrence of floating skin. Continuing to pay attention to the results of excessive orange fruit thinning, sparse fruit and malformed fruit, pests and diseases. During the fall period of the orange tree, the tree crown sprayed 2-3 times potassium phosphate and compound fertilizer and other phosphorus-containing nutrient solution, which will help improve the quality of the fruit and promote flower bud differentiation. Branches of high-risk gardens should pay attention to tied up and be prevented from being destroyed by the typhoon. Pest control In August, the orange rust mites were prosperous, and 20% tetracycline 1500-2000 dilutions and 5% fenazinate 1000-1500 dilutions were used to control citrus rust. Precocious citrus varieties should be bagged in time to prevent the damage of fruit-feeding moths. When the shoots are drawn 0.5-1 cm long, select 1% or 1.8% abamectin (abamectin) EC 2500x, 98% QL soluble powder 1500-2000x, 20% exterminator. Urea SC1500-2500 times and other control leaf miners. Early autumn shoots usually taken before the beginning of August can avoid the harm of leaf leaf moths, but they should still be controlled by spraying. Citrus anthracnose can be used 50% Tuzet WP 600 times, 50% carbendazim WP 500 times, 50% TOPEX WP 500-800 times and 50% dexamethasone 800 times. Liquids, etc. for prevention and control, once every 7-10 days control, continuous prevention and treatment 2-3 times, but also concurrent treatment of bituminous coal, scab, and so on. China Agricultural Network Editor
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