Water and fertilizer management in the young fruit stage

After entering June, most of the northern land grapes entered the young fruit stage, which is a very important stage in the grape growing period. It is related to the yield and quality of the grapes of the year, so it is necessary to make some efforts in management and grasp the following points.

1. Make fruit thinning

This is an important measure to reasonably control yield and keep the ears even and tidy. After the natural physiology of young fruit drops, according to the actual situation, we can grasp the thinning fruit, especially the fine production orchard. Dense fruit, improve fruit quality.

2. Scientific and rational use of expansion

Tetraploid varieties are dipped in bulking agent after fruit thinning, and seedless varieties can be dipped in low concentration gibberellin. The concentration of swelling agent and gibberellin should be determined according to the requirements of the instructions and according to different varieties and test conditions. It is not advisable to use bulking agents and gibberellins for nuclear Eurasian grapes.

3. Grasp the ear bag

In order to reduce the occurrence of diseases and prevent the pollution caused by the use of pesticides to the ears, vigorously promote and promote fruit bagging. Bagging of fruit ears should be carried out in time after fruit thinning and dipping. Use a systemic fungicide before bagging, and hold the bag tightly after using it. The selection of pesticides before bagging should consider the prevention and control points of diseases and insect pests. The key points of prevention and control before bagging are gray mold, anthracnose and white rot.

4. Use good topdressing

Enlargement of the fruit requires sufficient nutrition. In the early stage of the expansion of the young fruit, drip irrigation (impulse application) of a balanced large amount of elemental water-soluble fertilizer 5-10 kg/mu from the size of the mung bean fruit, once every half a month. At the same time, it is combined with leaf spraying to prevent and control pests and diseases to improve stress resistance, increase leaf flexibility, and prevent fruit cracking.

5. Field management

Mainly water control, plowing and weeding, topping and deputy shoots. Keep the soil dry and wet. It is best to use drip irrigation for watering. At the same time, it is necessary to grasp the toppings, remove the secondary shoots, and properly control the vegetative growth, so as to facilitate the growth and development of the fruits with concentrated nutrition supply. Tie the new shoots in time, improve the ventilation and light transmission conditions and the microclimate in the field, in order to facilitate the normal growth of grape plants and the development of berries.

Sixth, pay attention to pest control

This period focuses on the prevention and treatment of downy mildew and anthracnose. The rainy season is a time when downy mildew easily occurs. Therefore, we should focus on prevention in this period.

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