The pests and diseases of jujube trees are the biggest problems and problems in the management of jujube trees. If they are not handled well, they will cause great losses. At the same time, the chemical control in the growing season not only increases the cost of prevention, but also brings great hidden dangers to the quality of jujube fruit, which easily leads to excessive pesticide residues. According to the wintering characteristics of jujube pests and diseases, combined with winter management, targeted prevention and control can have a multiplier effect.
Qingyuan. Jujube rust, green blind elephant, jujube moth and other pests and diseases are overwintering in litter or weeds under trees. Therefore, jujube trees should be cleaned in time to remove dead leaves, rotten fruits and weeds. And concentrated burning or buried deep underground, can remove some of the wintering pests and diseases.
Digging insects and insects. According to the habit of wintering in the soil around the trunk of the small heartworm, the jujube step, combined with the deep soil turning, before and after the soil is frozen, picking up the winter insects, insects and insects, and eliminating them, can effectively reduce the number of insects in the coming year.
Scratch the old skin. The temperature under the bark is higher than the temperature, and the bark and tree sew are the wintering places for the pests and diseases such as jujube, red spider and so on. By scraping the old skin, not only can the pests and diseases be eliminated, but also the growth of the trees can be stimulated. Scrape is carried out after the leaves have fallen to the point of germination. When scraping the skin, lay a plastic sheet under the tree to collect the bark and insects, then burn or bury them.
Painted white. Whitening the trunk can prevent cold and prevent disease. The formulation of the whitening agent is 12 parts of quicklime (opened with cold water), 2 parts of sulfur or 3 parts of raw material of stone sulphur mixture, 2 parts of salt (opened with hot water), 36 parts of water, and appropriate amount of glue. Lime and sulphur can prevent freezing and sunburn, and prevent disease and insecticide. Salt helps the lime to penetrate into the bark to keep moisture, prevent lime cracking and peeling, and adding glue can enhance the adhesion of the whitening agent. The whitened parts should be high, and the branches that scrape off the old skin should be painted white to prevent dry shoots.
Cut insects and insects. Combined with winter pruning, cut off the insects that are harmed by the turtle wax. For the big branches with serious damage, you can use the wire brush to remove the overwintering insects on it, and pay attention to the wintering mites of the yellow thorn moth.
Spray the medicine. Because there is a wax shell on the surface of the turtle wax, it is difficult to kill it by chemical pesticides. It can be sprayed with diesel emulsion to eliminate it. Before the germination of jujube trees, the whole tree should be sprayed evenly and carefully to the Bamei 5 degree stone sulphur mixture to prevent pests such as red spiders and pear garden mites.
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