We may have all seen it before the fruit is still on the tree and the fruit is put in a bag before it is ripe, but why we put a bag on the fruit may not be completely clear to most of us. , even if it is clear, not everyone understands its function.
Speaking of bagging fruits, this is actually a very traditional technology. There have been many people studying this area, so it is not a new topic. Although bagging has been around for hundreds of years, initially attempts were made to protect fruit with paper bags simply for pest control purposes. However, the large-scale bagging of fruits has not been used for a long time, and the research history is not long, which is about thirty or forty years. As the scope of application of fruit tree bagging becomes wider and the technology becomes more and more perfect, in fact, the comprehensive effect of bagging is not only for the prevention and control of pests.
Nowadays, many types of fruit trees are generally bagged during the growth and development process of the fruits if they want to improve the quality of the fruits. However, as a fruit industry, it is a labor-intensive industry. Bagging fruits requires a lot of manpower and material resources. Therefore, some fruit farmers directly skip the bagging process in order to reduce costs. However, because bagging can improve the quality of fruits and improve their commercial properties, many people still choose to bag fruits.
What is the reason that makes people put bags on the fruits no matter how hard they work, no matter how much it costs? In fact, fruit farmers are very clear about this. If the fruit is evenly colored through bagging, the fruit surface is smooth and beautiful, and the color is bright, it can effectively prevent the invasion of pests and diseases, reduce pesticide residues and dust pollution, and prevent the occurrence of fruit sunburn disease. Improve the grade and commodity rate of fruits. Then, unnecessary losses will be reduced. In comparison, fruits can be sold better, and the manpower and physics spent on bagging are very necessary. The functions of bagging mainly include the following aspects:
A. Improve the fruit quality of fruits. After bagging the fruit, it can promote the coloring of the fruit and make the fruit bright in color. At the same time, bagging can avoid irritation and damage to the peel from wind, rain, chemicals, and dust, allowing the peel to develop well. It can also avoid permanent scars on the peel caused by mechanical friction caused by external forces. In addition, bagging will also affect the size and intrinsic quality of the fruit, changing the flavor of the fruit, etc.
B Reduce the occurrence of pests and diseases. This is because after bagging, the fruit bag will block the contact between the fruit and the outside world, greatly reducing the chance of invasion of pathogens and pests. Bagging can promote the activity of polyphenol oxidase and isolate the fruit from damage caused by adverse external environments such as diseases and insect pests. This polyphenol oxidase is mainly a substance that provides protection for fruits against adverse environments such as pathogenic bacteria, pests and diseases. In fact, the original purpose of bagging is to control pests and diseases.
C Reduce the hazards of pesticide residues. Generally, bagging is an indispensable link in the ecological cultivation of fruits. This is mainly because bagging can prevent the fruits from being contaminated by harmful dust and avoid direct contact between pesticides and the fruit surface, so pesticide residues will be reduced. But this is not absolute. In theory, it is like this, but in practice, there are still cases of pesticide residues in the fruits after bagging. This is mainly related to the type of pesticide. Therefore, if we want to fundamentally remove pesticide residues, we should reduce or eliminate pesticides.