First, continue to prevent disease and protect leaves
The temperature difference between day and night is getting bigger and bigger, and the condensation phenomenon will appear, which means that downy mildew will continue to damage the leaves of the grapes. The damage of the leaves to the disease will also affect the photosynthesis of the plants. The grape plants that have been working hard for half a year need more organic nutrients produced by photosynthesis to survive the winter. Therefore, prevent disease and leaf, can not relax.
Specific measures: If downy mildew is first seen and not serious, preventively, spray pyraclostrobin or azoxystrobin + mancozeb, if downy mildew has occurred severely, bactericidal inhibition and promotion of leaf chlorophyll The synthesis is carried out simultaneously, and the enoylmorpholine or flumorpholine + mancozeb + calcine or humic acid foliar fertilizer is used.
Second, the quality and quantity of the application of the base fertilizer
The base fertilizer applied in autumn is equivalent to the moon fertilizer, which is a necessary nutritional supplement for the grapes that have been hard for half a year. However, many people do not pay much attention to this, often because they are busy picking and selling grapes, with no time as an excuse, or because the weather is not suitable for field operations, or when the temperature is already low until October or even November. Or simply do not apply fertilizer, and then pursue it next spring. This is a misunderstanding, a bit of self-deception, or not.
The significance of fertilizing grapes in autumn is not only the moon fertilizer, but the use of light and temperature before winter, green leaves, and the second peak of root activity, applying NPK, calcium, iron, zinc, etc. to the grapes. Trace elements and organic matter are stored in grape plants through photosynthesis of synthetic organic nutrients for germination and shoot growth next spring.
Specific measures: The base fertilizer can be used in the autumn after harvesting in autumn. Generally, the ditch is applied, that is, about 50 cm away from the plant, or the ditch or manual is used to excavate the ditch 40-50 cm deep, and the fully decomposed Farmyard manure, NPK fertilizer apply evenly. The amount of application accounts for more than 50% of the total fertilization in the whole year. After the application, cover the soil and pour the water.
Third, antifreeze winter
The threshold value of the low temperature tolerance of the stems of most grape varieties is -17 ° C, and the root system is -5 ° C. Therefore, it is necessary to bury the stems for wintering. The time of burying is generally carried out half a month before the local freezing, but the temperature changes frequently during the early winter every year. Sometimes a sudden heavy snow will cause fatal damage to grapes that have not taken cold protection measures. Therefore, in the early winter, we must always pay attention to the weather forecast and take measures to prevent freezing damage.
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