In the management of fruit trees, there are still many physical measures to prevent and control various symptoms, such as girdling, branch pulling, shaping, pruning, etc. Each measure deals with different problems. , the effects produced will be different. Skin scraping is also a physical control measure, but it is generally rare. Why is it so rare to peel fruit trees? Because its application scope is limited, it is mainly targeted at old fruit trees that are more than ten years old.
Shaving the bark off fruit trees is usually done in winter, so we sometimes wonder why people are still taking measures to protect fruit trees from the cold during this winter. If it's scraped, aren't you afraid of freezing the fruit trees? What is the reason why people insist on scraping the bark of fruit trees at the risk of their fruit trees being frozen?
Before we talk about the use of skin scraping, let’s first take a look at how skin scraping is done. Scraping is an important part of the management of fruit trees, but this measure is mainly for adult, mature and old fruit trees. The so-called skin scraping is to use a scraper to cut off the main trunk, large branches and branches of the fruit tree. Scrape off the old, rough and dry skin.
There are two main reasons for scraping the bark of these old fruit trees. One is to promote the growth of these old fruit trees, and the other is to eliminate various diseases and insect pests hidden in the bark of the fruit trees. . Because the bark of old fruit trees is not rough, most of it has lost its elasticity, thus squeezing the tubes and making the tree prone to premature aging. Therefore, skin scraping is to reduce the pressure on the old bark and renew the bark. At the same time, after winter begins, the eggs, pupae, larvae, adults and hyphae and spores of many fruit tree pests and pathogenic bacteria will sneak into the old bark, warped bark, diseased bark and tree holes to hide and survive the winter. By scraping the bark during this season, you can reduce the attachment of these overwintering pests and diseases to the tree.
Now we understand the reason and purpose of peeling fruit trees. Therefore, people often say a saying in the management of fruit trees, that is, "scrape the skin once, save three times of medicine." In addition, There is also a saying, "If you want to eat pears, scrape the bark." That is to say, for old fruit trees such as pear trees or apples, especially those that have suffered from diseases and insect pests, scraping the skin once can not only spray pesticides to eliminate diseases and insect pests, but also enhance the tree vigor. The effect is like fertilizing Just as significant.
Scraping bark can be said to be a cost-effective, trouble-free, easy-to-operate method that can increase production. But this bark is always the cortical tissue of the fruit tree, responsible for protecting the tree and transporting nutrients. Therefore, hanging a layer of bark is equivalent to taking off a layer of clothing, and the cold resistance will be significantly reduced. Therefore, you still need to master some skills to scrape the skin of a fruit tree whenever and however you want. Otherwise, the fruit tree will be easily scraped to death. When it comes to scraping hanging trees, several points that need to be mastered are which trees can be scraped, when to scrape, how to scrape, where to scrape, and what to do after scraping. Let’s talk about it one by one:
A What kind of trees can be scraped? Before scraping, you must first check the fruit trees to see if there is thick old bark, and secondly, whether there are pests and pathogens that have survived the winter. Trees that have neither of these cannot be scraped. The main tree species for peeling are pear, jujube, chestnut and other fruit trees that are more than 10 years old and have thick old bark and disease spots. For peach, apricot, plum and persimmon fruit trees that are difficult to peel, you can pry or brush the bark. method.
When will B be shaved? The best time to peel fruit trees is generally after the soil freezes in winter and before the hibernation in spring. The best time is December and January and February of the next year. Areas with warmer temperatures in winter can be scraped as early as possible, but in places with colder winter climates or in shady areas of mountains, scraping should not be done too early to avoid freezing the trees. It can be postponed from the beginning of spring to before the awakening of insects.
How to scrape C? There are many opinions on how to shave. To sum up, it is mainly suitable for small and weak trees to be lightly scraped, and for large and strong trees to be heavily scraped so as to reveal red but not white. For example, the outer layer of the pear tree is thicker and has many cracks, so pests can easily hide. It needs to be scraped deeper until the smooth red color is exposed. In short, it is necessary to improve the quality of scraping, scrape off the rough and old skin, and make the surface smooth and seamless without leaving any stubble, so as to achieve the effect of eradicating pests and disease spots.
Where to scrape D? The reasonable peeling site during the dormant period of fruit trees is determined by the overwintering location of the pests on the fruit trees. Under normal circumstances, the number of pests overwintering in the main trunk of large trees with pear fruit is small, and the number of natural enemies overwintering is high, while the opposite is true in the parts above the main trunk branches. However, jujube armyworm and persimmon stemworm overwinter in large numbers in the bark cracks on the trunk, so the focus of skin scraping on fruit trees should be on the trunk and below the middle part of the main branch. However, for fruit trees that have been infected, the affected areas must be scraped clean and thoroughly.
What should I do after scraping? When scraping the bark, lay a layer of plastic sheeting or mat on the ground around the tree in advance so that the scraped bark and pests can be concentrated and burned or buried deeply. After scraping the fruit tree, it is best to spray some ferrous sulfate solution and then whiten the trunk in time. This not only prevents sunburn and frostbite, but also kills pests and diseases exposed by scraping.
Wenshan Mandrill
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