When is the Best Time to Bag Grapes
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When is the Best Time to Bag Grapes
Bagging grapes can prevent and reduce fruit diseases, reduce the use of pesticides, and also increase the rate of high-quality fruit, enhancing economic benefits. Grapes are generally bagged after their physiological fruit drop, and the best time for bagging is between 9:00-11:00 AM and 2:00-6:00 PM on sunny days. When bagging, open the paper bag, then encase the entire cluster of grapes from bottom to top, and then shrink the bag opening to the peduncle, securing it with one side of the sealing wire.
The Benefits of Bagging Grapes
Bagging grapes can prevent and reduce fruit diseases, reduce the amount of pesticides used, lower pesticide residues, improve the smoothness of the fruit surface, increase the rate of high-quality fruit, reduce fruit splitting, enhance economic benefits, and also provide some protection against bird damage and hail.
The Timing of Bagging Grapes
Grades are generally bagged after their physiological fruit drop (15-20 days after fruit setting). The best time for bagging is between 9:00-11:00 AM and 2:00-6:00 PM on sunny days, avoiding high temperatures after rain. In some parts of the north with severe sunburn, bagging can be appropriately postponed.
The Method of Bagging Grapes
When bagging grapes, first open the paper bag with your hands to make it expand, then encase the entire cluster of grapes from bottom to top, and then shrink the bag opening to the peduncle, securing it with one side of the sealing wire. Leave 1-1.5 cm of the paper bag above the wire, and avoid揉搓ing the cluster with your hands when bagging.
What Type of Bags to Use for Bagging Grapes
Generally, grapes should be bagged using special pure white, treated polyethylene fiber bags or paper bags. Red varieties can use translucent glassine bags or plastic film bags with large pores. To reduce the acidity of grapes, glassine bags or plastic film bags that can increase the temperature inside the bags can also be used.
What Pesticides to Apply Before Bagging Grapes
Before bagging, grapes should be sprayed with a fungicide, such as carbendazim, and then bagged. This can better prevent the fruit from suffering from diseases and pests during the expansion and growth stage, which could lead to unattractive or poor growth of grapes.
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