Because greenhouse cucumbers are planted for successive years, Fusarium wilt is more serious, which seriously affects the growth and yield of cucumbers. To solve this problem, black-seed pumpkins are commonly used as rootstocks for grafting to control the occurrence of cucumber wilt. At present, many greenhouse cucumbers are in the slow seedling stage after planting, and they have already entered the early stage of fruiting. According to the author's on-site investigation, adventitious roots are easily grown on the vines above the grafting interface in this period. If not removed in time, it will easily lead to the occurrence of blight and affect the yield of cucumber.
First, the cause of adventitious roots of cucumber
First, the grafting interface is too low, or the planting is too deep, and the grafting interface is directly buried in the soil, and the cucumber seedlings produce adventitious roots. The second is that the vines are tilted, and the cucumber vines contact the surface soil, resulting in adventitious roots. Third, the soil surface humidity is too high. Although the cucumber vine above the graft interface does not touch the ground surface, due to suitable environmental conditions, the cucumber base is also prone to adventitious roots.
Hazards of adventitious roots in cucumber
If the adventitious roots of cucumber are not removed in time, the cucumber can not use grafting by using its own root system or pumpkin and cucumber root system. It is susceptible to wilt disease, causing poor plant growth in the early stage and dead seedlings in the middle and late stages, which seriously affects yield. If the adventitious root is removed too late, the nutrients produced by the plant will be supplied to the cucumber root system for development. The root system of pumpkin does not get sufficient nutrition and causes dysplasia. Even if it is removed later, it will have a certain effect on the growth and development of cucumber.
Removal and prevention of adventitious roots of cucumber
The first is to grasp the adventitious root of cucumber before entering the soil, and use a clean blade to remove it from the base of the adventitious root. The second is to choose during sunny and warm weather to facilitate wound healing. Third, for the seedlings that have been planted too deeply, after removing the root system, the soil at the base is removed to expose the grafting interface. Fourth, the melon seedlings should be hung straight after the roots are tilted. Fifth, rational watering, avoid flooding, and prevent the ground surface from getting too wet. Sixth, let the marry interface be above the mulch and seal the mulch tightly to prevent the occurrence of adventitious roots.
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