If the large wounds of fruit trees (pears, hawthorns, chestnuts, etc.) are not well protected, they are likely to rot. Under the harsh conditions of the outside world, the exposed xylem and pith will become darker and deeper, and the tree holes will form over time. Once the tree hole is expanded, the first is to damage the conducting organization so that it can not properly transport nutrients and moisture; the second is to cause further propagation of the bacteria and to increase the area of ​​ulceration; the third is to reduce the load capacity of the trunk and break it when a storm hits it. , chapped; Fourth, caused premature aging tree vigor. In order to promote fruit trees to recover as soon as possible and extend the age of fruit, in the winter slack season, it is necessary to take measures to fill holes in time. The hole filling procedure is as follows: 1. Clean the dirt. Tree caves are extremely filthy and become the root cause of diseases and insects. All discovered tree holes, regardless of their size, should be thoroughly cleaned to remove debris. In particular, the decayed material must be scraped until fresh tissue is exposed. 2. Disinfection. Apply 843 reconstitution fluid or 5 to 10 Baume degree lime sulfur to smear the scar after the scraping, and disinfect it. 3. Fill. Into the tree hole filled with a solid, non-hygroscopic, airtight, non-perishable filler. The filler can be mixed with 1 part of cement and 3 parts of stone, and quicklime and stone can also be used instead. The filling should be tight, leaving no gaps to prevent the xylem from continuing to rot with contact with the outside world. After filling, the surface shall be smoothed and then sprayed with 50% methicone 500 to 800 times and 75% chlorothalonil wettable powder 600 to 750 times around the tree hole for sterilization. L-size Carrot,L-size Fresh Carrot,L-size Premium Carrot,L-size Organic Carrots Yirun Agricultural Cooperative , https://www.yiruncn.com