Summary of the Advantages and Disadvantages of Grape Bagging
The following is a summary of the advantages and disadvantages of grape bagging in the field of green plants and flowers, for your reference:
Summary of the Advantages and Disadvantages of Grape Bagging
Bagging is sometimes a very important step to achieve high yields of grapes. Adjustments are made to bagging based on the characteristics of different grape varieties. Of course, bagging grapes is not always beneficial. Let's learn about the techniques and pros and cons of grape bagging.
Advantages of Grape Bagging
1. Reduces pests and birds, prevents sunburn, black spot, T-J disease, white rot, and fruit-eating pests such as grape borers and golden beetles.
2. After bagging, the frequency of applying pesticides decreases, reducing pesticide residues.
3. Can reduce the occurrence of fruit splitting, keeping the fruit surface clean and tidy, maintaining the integrity of the fruit powder, making the appearance of grapes more attractive, and increasing commercial value.
Disadvantages of Grape Bagging
1. Bagging requires time and labor.
2. After bagging, the light inside the bag is poor, and the coloration is generally 20-30% lower than that of non-bagged grapes, especially for varieties that color directly under sunlight, which mature 7-10 days later than non-bagged grapes.
3. The content of sugar and vitamin C in the fruit decreases.
4. Some varieties are prone to sunburn when bagging.
Key Points of Grape Bagging Technique
1. Bagging Time
Usually, after the flowers have fallen and the fruit has stabilized, about half a month later, bag the fruit together with the vegetables and fruits. At this time, the young fruit, as large as soybeans, can prevent early infections. The bagging time should not be too late, otherwise, the meaning of preventing and controlling pests and diseases will be lost. Bagging should be avoided after rainy and high-temperature weather, as it can easily exacerbate sunburn.
2. Bagging Method
Before bagging, spray fungicides such as compound carbendazim, mancozeb, and thiabendazole on the fruit clusters, let the solution dry, and then bag. Before bagging, dip one end of the bag opening, about 6-7 cm, into water to make it soft and easy to shrink the bag opening, improving bagging efficiency and securing the bag opening to prevent pests and diseases from entering the bag. When bagging, first open the bag with your hand to make the entire paper bag inflate, then cover the whole fruit cluster from bottom to top, and then shrink the bag opening to the fruit stem and tie it tight with a wire on one side.
3. Management after Bag Removal
After removing the fruit bags, grapes should not be sprayed, but the damage caused by golden beetles should be prevented. When the fruit is close to maturity, the old leaves around the fruit also age and photosynthesis decreases. At this time, removing some old leaves will not affect the maturity of the fruit but will increase the proportion of light on the fruit surface and the effective leaf area, which is beneficial for fruit coloring and nutrient accumulation in the tree.
The above provides a complete summary of the advantages and disadvantages of grape bagging, which green plant enthusiasts can refer to.