Techniques of bud grafting of jujube in summer
Before grafting, the jujube seedlings with robust growth, no diseases and insect pests, and a basal stem diameter of more than 0.5 cm are selected as rootstocks. Clipping growth robust, no diseases and insect pests, bud eye enrichment, the year of lignification branches do scion, thick 0.4~0.6 cm, cut off leaves to leave petioles. Cut scion into 20~30 cm long segments, wrap them with wet sand or wet sacks to keep moisture and store them. Pay attention to spraying water in time. Grafting on the rootstock attached to the bud part of a cut, deep to xylem, from top to bottom open 1.5~2 cm long "T" word to form a joint. Cut the scion 0.5 cm above the full bud, 1~1.5 cm deep into the xylem. Cut scion from bottom to top at 1~1.5 cm below bud, length slightly shorter than interface on rootstock. Sticking the buds into the "T"-shaped interface of the rootstock, aligning the bud cambium with the rootstock cambium), and tying them tightly with plastic strips 0.5 cm wide. After grafting management 15~20 days after grafting, touch the petiole on the scion with your hand, and if it falls off at one touch, it is proved that it has not survived, and it should be repaired in time. In the spring of the following year, the plastic strip was removed and the rootstock was cut at 2~2.5 cm above the grafted bud to promote the survival and germination of the grafted bud.
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Control methods of jujube gall midge pests
This insect is commonly known as jujube leaf maggot, which is distributed in various jujube areas all over the country and harms young leaves, buds and young fruits with larvae. The young leaves were tube-shaped curled, purplish red, hard and brittle, and soon blackened and withered. After the bud is killed, it can not open, wither and fall off. The young fruit is not properly nurtured and grows up. When it is the size of a soybean, it turns yellow and falls off.
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Five misunderstandings in jujube management
First, only paying attention to winter shearing while neglecting summer tube jujube winter shearing can adjust the tree potential and improve the ventilation and light transmission conditions inside the crown, which is beneficial to concentrate nutrients and improve the quality of jujube fruit in the following year. "the trees are cut in winter and the summer tubes are solid." The main measures of summer tube are to remove the cuttings, remove the heart, pull the branches, remove the dense branches and the strong branches on the back. Some jujube farmers.
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