After the cucumbers are connected in series, they are not susceptible to the wilt disease, and the survival rate is high, and the effect is better than the connection.
The string method requires that the pumpkin be sown first and the cucumber sown when the pumpkin is unearthed. The hypocotyl diameter of pumpkin seedlings was 0.5-0.6 cm, and the diameter of cucumber seedling hypocotyls was 0.3-0.4 cm. At this point, the seedlings of the pumpkin are 7 to 10 cm in height (just growing out from the true leaves), and the cucumber seedlings leave the heart.
The heart of the pumpkin seedlings is first removed, and then the bevel of bamboo skewers (facet) is faced upwards. From the top of the cotyledon of the pumpkin seedlings, 0.2 to 0.3 centimeters from the growth point is penetrated through the main vein, passing through 0.2 cm below the growth point. 0.3 cm below the other cotyledon, just let the bamboo stick penetrate. Be careful to pierce the growing point and avoid the hollow part of the hypocotyl, but do not pierce the epidermis. Cut 1 to 1.5 centimeters of the cucumber seedling without a cotyledon with a blade and cut 30 to 40 degrees (cut the hypocotyl) downwards. Cut noodles 0.7 to 0.9 centimeters long. Pull out the bamboo knife and cut the cut cucumber noodles. Face down, insert from the hole through which the bamboo knife passes.
After grafting, the squash roots were immersed in nutrient soil within 12 cm in diameter and then poured with warm water of 20-25°C. Nursery beds have electric hotlines in advance. Two layers of film sheds were placed on top of the seedlings, and straw drapes were added at night. The temperature inside the shed is always maintained at 25-26°C, and the relative humidity of the air is kept at 80%. During the day, the shade is properly over 26°C. Generally, after 3 to 4 days, scion and rootstock can heal. After that, temperature management is performed, that is, the greenhouse temperature is maintained at 26 to 30°C in the morning and 20 to 25°C in the afternoon. The temperature is maintained at 16 to 20°C in the middle of the night and 12 to 16°C in the latter half of the night. After one week of living, the cucumber seedlings began to grow, and the pumpkin leaves that had not been cut during the grafting process had to be removed in time.
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