Due to years of planting, greenhouse cucumbers have been seriously affected by wilt disease, which has seriously affected the growth and yield of cucumber. In order to solve this problem, blackcurrant squash commonly used in the production of rootstock grafting method to control the occurrence of cucumber wilt. At present, many greenhouse cucumbers are in the stage of slow seedling after planting, as early as the beginning of the fruiting period. According to the author's on-site investigation, during this period, cucumbers could easily grow adventitious roots on the melon vines above the grafting interface. If they are not removed in time, they can easily cause the occurrence of the wilt disease and affect the cucumber yield.
First, the reasons for the adventitious roots of cucumber
First, the grafting interface is too low, or the planting is too deep. The grafting interface is directly buried in the soil and the cucumber root produces adventitious roots. The second is that the vines are tilted. The cucumber vines come into contact with the surface soil and produce adventitious roots. Third, the soil surface humidity is too large, although the grafted cucumber vines do not contact the surface, but because of the appropriate environmental conditions, the cucumber base is also easy to produce adventitious roots.
Second, the risk of cucumber producing adventitious roots
If the adventitious roots of cucumber are not promptly removed, cucumbers use their own roots or the combination of pumpkin and cucumber roots will not achieve the effect of grafting. They are susceptible to wilt disease, resulting in poor plant growth in the early stages and deaths in the middle and later stages, seriously affecting yield. If the adventitious roots are removed too late, the nutrient produced by the plant will supply the roots of the cucumber. The lack of adequate nutrition in the root system of the pumpkin results in poor growth. Even if it is removed later, it will have a certain influence on the growth and development of the cucumber.
Third, cucumber root removal and prevention methods
The first is to grasp that the adventitious roots of the cucumber are taken before the soil is infiltrated and removed from the base of the indeterminate root with a clean blade. The second is to choose sunny and warm weather to facilitate wound healing. Third, for planting seedlings that are too deep, after removing the root system, the soil is removed from the base to expose the grafting interface. The fourth is to straighten the melons after cutting them off. Fifth, reasonable watering, flood irrigation to prevent surface moisture. Sixth, let the marrying interface be above the mulch and seal the mulch to prevent the formation of adventitious roots.
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