How to increase the grafting survival rate of eggplant

The selection of seedlings is the key to removing weak seedlings, young seedlings, and diseased seedlings before grafting.

The seedbed environment is very important In general, the first 3 to 4 days after grafting of eggplant is the critical period for the healing of the interface. The light, temperature, and humidity are strictly required. Special attention must be paid to management. During the day, the temperature in the small arch shelter is maintained at 25°C to 28°C, and at night at 20°C to 22°C. The relative humidity of the air is 95% or more (ie, the inner surface of the small arch cover is covered with water droplets evenly). In the first 3 days after grafting, the small arch shed was completely closed and shaded with a straw screen. On the 4th day, a small 5 cm gap was opened at the top of the small arch shed for ventilation. Afterwards, the ventilation time was gradually increased every day and ventilation slits were increased. After the seventh day, grafted seedlings could be completely ventilated. After the grafted seedlings were completely ventilated, the grafted seedlings were sprayed with 300-fold potassium dihydrogen phosphate and 600-fold Prec mixed liquor to prevent yellowing of the scion leaves.

Spraying with clear water to prevent wilting. On the 4th day after grafting, the grafted seedlings are shaded and shaded before they appear wilting. On the 7th day, after the small arch shed is fully ventilated, the humidity in the arch shed will rapidly decrease. If the humidity drops greatly, the humidity in the arch shed needs to be increased. At about 10:00 am, the interior surface of the arch shed can be sprayed with clean water. In the case of shading, if the scion is still wilting, spray the leaf on the scion.

Transplanting seedlings in time and adding nutrients on the 9th day after grafting, the grafted seedlings survived completely and could be colonized; the grafted seedlings could also be managed in a graded manner. Sunny branches were selected to remove newly sprouted lateral branches and yellow leaves and diseased leaves on grafted seedling rootstocks. The weak seedlings were placed separately from the healthy seedlings, and the distance between the nutrition bowls was set at 3 cm to enlarge the light area of ​​the grafted seedlings. After the nursery beds are filled, floodwaters fill the seedbeds and the water diffuses to 1/2 of the height of the nutrient bowls to promote the growth of the seedlings. The planting will be carried out about 12 days after grafting.

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