Time and method of pinching grapes in winter

During the grape planting process, it is necessary to do a good job of pinching the grapes, especially in winter. Depending on the method of pinching grapes and the type of frame, pinching should be moderate. Below, the editor will introduce the time and method of pinching grapes in winter. Let's take a look.

1. Picking time

First pinching: For fruiting shoots, pinching is generally done 3-5 days before full flowering, and at the latest during the flowering period. For varieties with severe flower and fruit drop, you can pinch off the top 8-10 days before flowering. For varieties with mild fruit drop, pinch off the top later.

The second pinching is done when the fruit starts to swell after fruit setting.

The third pinching is carried out in the late stage of hard core, and in the late stage of slow fruit expansion of seedless varieties.

2. Tipping Method

The first pinching: For most varieties using double cross V-shaped frames and high and wide vertical frames, including varieties that grow too vigorously, new shoots should be pinched at the same height when they are about 80 cm long. The more they exceed, the heavier the pinching. Do not pinch if they are less than 80 cm.

Second pinching: When the lateral shoots at the top have 6-7 leaves, pinch off the leaves after leaving 5 leaves. For vigorously growing vineyards and varieties, pinch off the leaves after leaving 3-4 leaves. For weakly growing lateral shoots that have not yet reached 5 leaves, just pinch off the leaves.

The third pinching: pinch off the top branches and leave 3-5 leaves, so that the whole vine has about 20 leaves. The lower vines of trellis cultivation do not need to be topped off, but it is difficult to top off the vines of trellis cultivation. In an orchard with sufficient fertilizer and water and a variety with vigorous growth, if the top lateral shoots grow too fast, you can pinch the top once between the second and third pinching to control the growth of the top lateral shoots.

3. Notes

1. A single shoot must have two or more palm-sized leaves to ensure photosynthesis.

2. If the tree is too weak or has too many new shoots, pinch off the top late. If you pinch off too early, the tree may not grow well.

3. When pinching and pruning, be sure to pay attention to the prevention and control of diseases on the wound.

4. For the new shoots that sprout after pinching, except for one lateral shoot at the top, all should be removed from the base. When the lateral shoot at the top grows to 6-8 leaves, pinch again.

5. If the tree is weak, it must be re-topped and the tops must be pinched off late. Generally, after pinching off the top of the flowers, nutrients will naturally flow back, which can increase the fruit setting rate.

The above is an introduction to the time and method of pinching grapes in winter. When pinching off the new shoots of grapes, only pinching off the tips will not achieve the desired effect of pinching. When pinching the leaves, growers should keep in mind that the top leaves left after pinching should be at least 1/3 larger than the normal leaves.