Late Management of High grafting and replacement of Citrus

1. Do a good job of shearing piles. After using the belly to connect the exposed bud, the anvil pile should be cut off or sawed off, divided into two times, the first time to leave about 15cm anvil pile on the interface, wait for the new tip lignification, then cut the pile at the interface, and cut the pile mouth flat with a knife.

Second, do a good job of removing sprouting. After high grafting, due to cutting off the top advantage, the tree body nutrient supply is sufficient, often a large number of buds, should be cut off as soon as possible with a blade, otherwise affect the growth of buds, generally a week or so except buds.

Third, timely germination. If it belongs to bud bundling, it should be released after the first shoot lignification; if it is bud bundling, it should be exposed in time when the bud survives and germinates; autumn buds should be exposed when the spring buds germinate in the following year. 1 month after spring grafting and half a month after summer grafting, check for survival, expose buds in time, and supplement grafting for those who do not survive.

4. Do a good job of picking the heart. When the new shoots grow to about 20cm, remove the heart bud, promote the new shoots, expand the crown, and promote the early fruiting.

5. Do a good job in fertilizer and water management. After top grafting, in order to promote the growth of spring, summer and autumn shoots and accelerate the restoration of tree crown, the fertilizer and water supply should be fully ensured, the amount of nitrogen fertilizer should be increased, and the top dressing should be applied once before spring, summer and autumn shoots sprouting, especially summer and autumn are the peak periods for citrus to absorb fertilizer, and the demand for various nutrient elements is large, so compound fertilizer or urea plus decomposed human and animal dung should be selected.

6. Do a good job in pest control. Citrus is mainly damaged by insects after high grafting, mainly red and yellow spiders, orange aphids and leaf miners and other pests. 3~5 months at any time to observe the occurrence of red, yellow spiders, such as investigation of hundred leaves, more than two per leaf should be sprayed control, can be alternately used hydroamidophos, omethoate, pyridaben and other pesticides; aphids harm citrus leaves curl, on the growth of branches and leaves, in spring and summer shoots often pay attention to the occurrence of aphids and timely control, can be used omethoate 1000 times solution or 20% kill chrysanthemum resin 5000 times solution control; When the shoot sprouted in autumn, special attention should be paid to the prevention of leaf miner. Spray should be started when the shoot sprouted 2~3mm and the sprouting rate of the whole garden was above 50%. 20% Miaoli emulsion 1000 times can be used for control.