Early spring to prevent and control apple rot
Rot disease is one of the major diseases of apple trees. It seriously affects the production of apple trees. Early spring is a critical period for controlling apple tree rot, and it must be prevented and treated as soon as possible.
The apple tree rot diseased tissue is soft and immersed in water, and has a distiller's grain smell. The diseased skin is easily peeled off. Afterwards, the diseased part shrinks and sinks and becomes dark brown. The disease can significantly weaken the tree vigor and affect the yield, even causing the entire trunk to die.
The disease has two peak periods in a year, the first time in March-April, and it is also the most serious period of the year and the critical period of prevention and control; the second is from September to October. The main invasive ways of rot diseases include cutting slash, mechanical injury, sunburn, disease and insect injury, freezing injury, and falling layer. After freezing injury and high yield, the disease is extremely prone to pandemic.
The occurrence of the disease is caused by the following aspects: tree nutrient deficiency, debilitating tree vigor, decline in disease resistance, improper management of fertilizer and water. In recent years, some orchards have been fertilized less, especially organic fertilizers are used less, soil fertility is lower, resulting in weakened tree vigor and decreased resistance to disease; late in the garden, most fruit growers postponed the time to the second spring, orchards Diseased branches, diseased leaves, and diseased fruits are thrown away everywhere. In this way, pathogens will fall to the trunks, tree shrews, and swarf cuts with wind and rain. Improper methods of prevention and control, and some fruit growers do not scratch well when preventing rot. Skin, lesions almost all around the slant, some farmers do not scrape skin, only a few knives in the disease skin, coated with the drug, plus scraping treatment do not pay attention to tool disinfection, scratch wounds do not pay attention to the coating Protectants, etc., cause rot disease to occur.
Prevention and treatment of the disease should start from the following aspects: 1 to strengthen the cultivation and management, enhance tree vigor, and improve the tree disease resistance, is the basic measures to prevent apple tree rot disease, such as doing a good job of thinning the fruit, prevent size, reasonable load , Increase the application of phosphorus and potassium fertilizers and organic fertilizers, timely watering and so on. 2 Carefully clearing the garden and deep turning. 3 timely scrape skin and apply medicine. Regular observations should be made to detect the diseased plants in a timely manner. When scraping off the lesions, it is best to lay a plastic sheet under the trees in order to collect the scrapings. After removing the lesion with a knife, cut the depth 1-1.5 cm along the edge of the lesion. Note that the incision should be smooth. Then apply 5 bumeidoliths or 2 times more to the wound or Corbett, Guo Kangbao. , corruption, source di. The burned lesions were burned. If the lesion is in the trunk area and has a large area, besides active treatment, it should also be bridged. The shoots in the root should be cultured long enough to cross the lesion, and then the top of the shoot can be implanted into the tree. Pay special attention to the disinfection of the scraping tools. 4 spraying. Pharmaceutics mainly include Xinguo Kangbao, Guokangbao, Duchenqing, Leiqi, Kangjian and Nongkang 120 water agents. Before the spring germination, the whole tree will be washed and sprayed with 3-5 Baume degree lime sulfur or Fome The new fruit combo, generally choose cloudy days or days without windy morning spray.
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