Yes, because many bacteria are spread by wind and rain. If it rains just after budding, grapes are prone to get sick after the rain, so it is necessary to prevent it as soon as possible, and germs will invade from the wound and cause diseases. After the rain stops, if manpower permits, try to wipe it again.

Generally speaking, grape seedlings are germinated twice. The best time for the first time is in the early stage of germination. This time, the bud wiping is mainly to wipe off the buds on the trunk and the base of the main vine. It has been decided that there will be no buds, and the third and second buds in the raw buds. Pay attention to keeping strong buds, and follow the principle of keeping more in rare places, less in dense places and less in weak buds.

The best time for the second bud smearing of grape seedlings is about 10 day after the first bud smearing. At this point, you can clearly see the uniformity of buds. For weak buds that germinate late, twigs with no room for growth, fine buds near the base of mother branches, and adventitious buds in inappropriate positions, smear buds according to the size of space and the needs of branches. Ensure the ventilation and light transmission of the tree after budding.

Bud wiping method:

1. Grapes need to grow to 4-5 leaves to see inflorescences, so they need to grow to a long length to distinguish the number and size of inflorescences before they can be bud-smeared. Generally, double sharp points and large sharp points are the first choice.

2. If the buds are smeared too early, the new buds will be erased, leaving unnecessary development branches, which will affect the realization of the planned yield.

3. When the new buds grow to 4-5 leaves after grape germination, the diameter of the base of the new buds is already very thick. If it is erased by hand, it will cause a big wound at the base of the new shoot, which is not conducive to the growth of grapes and should be cut off from the base of the new shoot.

4. In addition, the fruiting branch of the grape in that year is also the fruiting mother branch of the following year, so only the fruiting branch is left when the bud is smeared, and no developing branch is left.

5. However, if it is necessary for plastic surgery and renewal, the developmental branches that must be left can be retained and generally cut off from the base.