How to avoid dormancy in southern grapes and how to break dormancy

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1. How not to sleep

2. How to break sleep

Dormancy is affected by the environment. In continuous low temperature environment, grapes cannot accumulate nutrients and will become dormant. Termination of dormancy is carried out slowly. It must meet its low temperature and then have a period of warm temperature before it can germinate and grow. Not dormant is detrimental to flowering and fruiting. Generally, it takes 1000-1500 hours of low temperature at 7 degrees to break dormancy, but it also depends on the variety.

1. How to avoid dormancy

Dormancy is affected by the environment. If it is a continuous low-temperature environment, nutrients cannot be accumulated and there will be no germination. The dormancy process is also terminated slowly. After a certain low temperature is met, it will take a period of warm temperatures before germination and growth can resume. It needs to go through 1000-1500 hours of low temperature at 7 degrees to break dormancy, but it also depends on the specific variety.

2. How to break sleep

1. Physical sleep-breaking method: When the temperature is between 7-8 degrees, cover it with film and add hay outside the shed for warmth. Uncover the hay at night and cover it again in the morning, which will facilitate some cooling measures such as low temperatures at night. It will take about 20-30 days to ensure its cooling needs, and then the temperature will be raised later to break the pruning. In addition, after entering dormancy, you can also check the temperature at night. When it is lower than 12 degrees, spray water on the fruit trees every day, once every 40-70 minutes. This can promote germination and break dormancy.

2. Chemical sleep-breaking method: Chemical sleep-breaking method is Use a facial breaker to release dormancy. There are many kinds of sleep-breaking agents, such as mineral oil plus ammonium nitrate or growth regulators, or cyanamide-type sleep-breaking agents. Among them, cyanamide-based sleep-breaking agents are relatively simple to use and very effective, so they are used more often.

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