First, saplings.
1, top dressing. In order to ensure that the high-yield skeleton is set up as soon as possible, the promotion of rapid growth is the key. Fertilization should take the principle of thin fertilizer and frequent application. In order to save labor, it is possible to apply urea according to each rain or hole. The applicator should be carried out in the event that rainwater can fully dissolve urea. The amount of fertilizer depends on the size of the tree, 0.5-2 each time. The interval is about 25 days.
2, topping, pull branches. When the new shoot grows to 30 centimeters, it picks up the heart in time to promote branching. The three-year-old tree carries out open angles to avoid the formation of a "tree."
3, cover. Coverage should be covered in time, with a thickness of 10-15 cm.
Second, the adult tree.
1, apply good fruit to promote shoot fertilizer. In the middle and late June, after the physiological fruit drop is stopped, this is the most important fertilizer for Jinpingkan, which accounts for 30% of the whole year. Plants producing more than 20 kilograms of trees, strains of urea 0.15-0.25 kilograms, compound fertilizer 0.5-2 kilograms, cake fertilizer 1-2 kilograms, in order to promote the quality of early autumn shoots and grow strong fruit. Wet trees can also be fertilized.
2. Control Citrus big fruit flies. Adults of the citrus fruit fly began to emerge in May. In mid-late and late-five months of the month, the peak of emergence occurred. After the emergence, the adults first crawled in the ground grass. After spreading their wings, they flew into a local place where there was a honey source and were unearthed. After mating began, spawning began 15 days after mating. From August to September, they hatched as larvae and entered the fruit. After the end of September, the larvae began to mature and fall into the earth with the falling fruit. The emergence of adult adults of B. fulvidus is a key period for prevention and control until the time of spawning, which is approximately 30 days. The current focus is to poison the soil before May 18, and use 5 mu of imported furan to mix the fine soil with the imported mussels. Sprinkle in the places where the trees line and nest the fruit and insects. In the event of drought, the iron canopies can be covered with light hands. Spray traps began in June. With 90% trichlorfon 1, two brown sugar (or sugar) 3 jins, watered 100 jins ratio to liquid medicine, interlaced spray, spray every 7-10 days, even spray 4-5 times, in order to Trapping killing adults. Hanging bowl seduce begins in early June. The liquid formula is: 1 part of 90% trichlorfon, 1 part vinegar, 1 part brown sugar, and 10 parts water. In the event that Bactrocera dorsalis harms serious areas, we must adhere to the principle of prevention and management of groups. Otherwise, we will not be able to achieve the control effect with half the effort.
3. Other pests and diseases: According to the investigation of the Municipal Plant Protection Station, Yajianjian May 5 is the first day of juvenile clams, and it is estimated that May 26-31 will be the young clam peak period. Whitefly larvae April 30 - May 8, the amount of 876 insects / louvers. The red spider on May 4 was 434 heads / louver, and the egg volume was 617 grains / louver. After this heavy rainfall, the number of adult locusts fell. It is expected that the population of red spider worms will appear at the end of mid-May. To this end, we must pay attention to the treatment of whitefly and prevent induced soot. Pharmacy can be used 25% ureide WP 1000 times, 0.5% fruit St. 800-1000 times, 25% fluocin WP 1500 times, Green ying 250-300 times + UB 2000 times. The medication time is May 18-22. Note alternate medication. The current rainy weather provides conditions for scab and anthrax epidemics. Attention should be paid to prevention and control. It can be produced by thiophanate-methyl or Dupont's pharmaceuticals. Also used in late protection agents such as Taisheng, Dasheng M-45, Xinmeng Meng etc.
4. There is more rain at the moment, and the ditch is drained to reduce the occurrence of pests and diseases.
5. In late June, summer shears will be performed for many results and weak tree vigor.
6, strengthen fruit protection. In late May, the use of spring rain No. 1, love more income, brassin to join imported high-potted foliar fertilizer spray. (Hubei Dangyang Agricultural 110 Service Center)
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