Why Do Oranges Need Bagging? An Introduction to Bagging Techniques
In orchards you can sometimes see oranges all wrapped in bags, and those who do not know may be a little confused. In fact, bagging oranges is an advanced method for producing high-grade premium oranges. Oranges produced through bagging are of better quality, and their price averages more than 1 yuan per kilogram higher than that of unbagged fruit. So why do oranges need bagging? Attached is an introduction to bagging techniques!
I. Benefits of bagging oranges
1. More attractive fruit
After oranges are bagged, the humidity and temperature inside the bag are relatively stable. With a higher temperature, the fruit's color becomes more intense, and the peel is not eroded by rain and the like, so the outer skin of the fruit becomes more attractive.
2. Fewer pests and diseases
After oranges are bagged, the rate of damage from pests and diseases is also reduced. Bagging plays a role in isolating insect pests. The annual incidence of disease is very high, and this method greatly reduces the damage from pests and diseases. Fruit growers can reduce pesticide applications by 5-6 times, and the overall production cost is also greatly lowered.
3. Isolation from pesticides
After bagging, the fruit cannot come into direct contact with pesticides, so there is no pesticide residue, making it a green, pollution-free, healthy fruit.
II. Orange bagging techniques
1. Spraying before bagging
Before bagging, spray the liquid medicine to prevent pathogens from being present on the fruit. Otherwise, after bagging, it instead provides a sealed, warm environment that continues to harm the fruit, making the effect of bagging counterproductive.
Moreover, spraying the agent will not affect the normal growth of the fruit and can also improve its coloring. Spraying needs to be done 2-3 times in succession. After the last spraying, bagging is required within 2-3 days. When bagging, keep the fruit surface clean; it should not have liquid medicine or dew, so as to avoid fruit rot.
2. Bagging time
Bagging oranges is suitable after the orange's physiological fruit drop and navel yellowing have ended. The specific time is preferably from July to mid-August, when the temperature is just right. If done too early, when the temperature is too high, it will affect the growth of the fruit; if done too late, the reticulation on the fruit surface is larger and sunscald is very likely to occur, affecting fruit quality. Bagging is suitable at around 9 a.m. or 4 p.m., and it is best to avoid the period when morning dew has not dried, the high temperature and strong light at noon, and the return of dampness in the evening.
3. Bagging method
It is best to choose double-layer or single-layer paper bags. The paper bags are required to be black on the inside and light on the outside, with moderate light transmission, good air permeability, and also strong expansion capacity and weak water absorption. In areas with lower winter temperatures, it is recommended to use double-layer bags. When bagging, grasp the principle of upper first, then lower, and inner first, then outer: first bag the fruit at the upper part of the canopy and the inner layer, then bag the fruit at the lower part and the outer layer. First open the bag mouth and, with the bag mouth facing downward, put the fruit into it. The fruit should hang in the center of the bag and should not touch the bag surface. Finally, tie the bag mouth well.
4. Management after bagging
10-15 days after bagging, spray the whole orchard with the agent and check the bagging situation. Once a broken bag is found, replace it in time. When using chemical agents, it is strictly forbidden to use copper-based pesticides, so as to avoid speckling on the fruit and affecting fruit quality.
The above is a brief introduction by Tuliu.com to orange bagging techniques. After oranges are bagged, there are fewer pests and diseases, and the yield of oranges rises accordingly. The production cost of oranges is lowered, and the yield can be increased again. This shows that bagging oranges is very important for fruit growers.