The causes and control methods of the latest grape bleeding

During the growth and development of grapes, there will be a bleeding phenomenon, which means that grape branches or roots flow out transparent juice from the new wound. This phenomenon will cause tree weakness, flower and fruit drop, yield decline, and heavy will lead to plant death. So what is the cause of grape bleeding? How to prevent and cure it? Let's take a look.

I. causes of bleeding

1. Pruning too late

When pruning, fruit growers often cause bleeding because of late pruning, especially after stinging. With the rise of temperature, the degree of bleeding will be aggravated. If you prune thick vines, it will often cause plant death.

2. Mechanical injury

The winter temperature in the north is cold, often for 0 degrees, so when planting grapes in the north, it is often necessary to bury the ground to prevent the cold in order to make it safe to survive the winter. However, with the rise of temperature in spring, the root system of the plant is often damaged because of improper operation, which is very easy to cause bleeding phenomenon.

3. Root injury caused by fertilization

When the temperature rises after the beginning of spring, in order to restore the tree momentum, promote sprouting and make it blossom and bear more fruit as soon as possible, fruit growers will fertilize the plants. But the grape is just the opposite, fertilizing it in spring will cause tree weakness, reduce yield and, in serious cases, cause no harvest, so remember not to apply fertilizer at the beginning of spring, so as not to burn the roots and make them die.

II. Prevention and control methods

1. Timely pruning

In order to prevent bleeding, grape plant pruning is best carried out after falling leaves, and at the latest before waking, otherwise it will cause bleeding. Pruning should also be paid attention to, it is not suitable for thick vines to be trimmed, so that the wound is too large and difficult to heal, resulting in wound flow.

2. Prevent damage when unearthed

Be careful when unearthed in spring, and use hand planing as far as possible when approaching the root soil, so as not to cause mechanical damage due to slight impropriety.

3. Change the habit of fertilization

Avoid grape injury when fertilizing, that is, from February to March, if you want to apply fertilizer, try to do it in mid-late April. At this time, as far as possible to choose organic fertilizer as base fertilizer, the fully mature organic fertilizer will be deeply buried, so that the plant can quickly accumulate nutrients and prepare for later growth and flowering and fruiting.

4. Protect the wound

Protect the wound is the best way to prevent bleeding, after pruning, you can use white latex or sealing oil on the wound, which can reduce the incidence of bleeding. According to the practical production, the wound flow rate of the unprotected wound is 50%, while the protected wound is only 10% Mur20%, and this method is convenient and fast, and the cost is very low.

The above are the causes and prevention methods of grape infection. I hope I can help you. If you want to know more about grape planting, please follow us.