The rootstock and scion incompatibility are the same kind of seedlings with strong affinity and high grafting survival rate; seedlings of different species are difficult or unable to survive. Countermeasures: When grafting seedlings, be sure to use varieties with strong affinity and strong adaptability as rootstocks.
When the grafting operation is sloppy, the rootstock and the cutting surface are not even, and the forming layers of the two rootstocks are not tightly aligned, or the contacting parts are very few. Countermeasures: The rootstock scion noodles should be flat and smooth, the forming layers of the two must be tightly aligned, the joints tightly sealed, and the membrane can not be prematurely resolved.
Scallop sprouting or stalk sprouting and thin grafting are too late in spring. When the graft is grafted, the scion has sprouted, and then the sprouts are quickly picked up. After the water and nutrients in the scion have been consumed, the interface has not yet generated the healing tissue and the water and nutrients are cut off; If the buds are too weak, they will lose their ability to grow or survive after sending a few leaflets. Countermeasures: Do a good job of scion storage, timely grafting, not sprouting scion and weak bud scion.
The anvil was sown early in the spring, sowing the seedlings in the early spring and the fruit seedlings grafted in the summer and autumn. After an anvil was cut, the scions and rootstocks died together. The reason is that the nutrients in the seed have been consumed, and the scion and rootstock are starved to death after cutting an anvil due to the lack of leaf-made nutrients. Countermeasures: First, after 10 days of living on the interface, 5 cm above the interface, the anvil stem should be broken 2/3, leaving 1/3 connected, so that the upper leaves continue to produce nutrients supply scion pull to maintain rootstock life, until the scion grows to 30 cm high, can produce nutrients and then cut the anvil. The second is to leave 4 to 5 leaves at the bottom of the graft while grafting. After cutting the anvil, nutrients are produced from the lower leaves to supply the leaves of the seedlings.
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