In production, vegetable farmers often think that after seedlings are planted, they can absorb nutrients and water from their roots, and the cotyledons will gradually decline, and they will be susceptible to diseases. It is better to cut them off in advance and the province will get into trouble. Then, after the seedlings are colonized, do they really need to support the cotyledons? the answer is negative.
The function of roots of seedlings after transplanting is still very weak. At this time, the plants still need the cotyledon to continue to supply nutrients. Early cutting of the cotyledons in this period has a great influence on the normal growth of seedlings and is not conducive to the cultivation of strong seedlings. In order to prevent diseases, seedlings must be carefully observed before they enter the shed. If they find lesions on the cotyledons, they should be singled out. If the lesions are small or there is only one lesion, the lesions can be cut off directly, but Never cut off all cotyledons so as not to affect seedling growth. Covered with plastic film, it is necessary to seal the membrane with soil; spray a broad-spectrum fungicide such as chlorothalonil and thiophanate methyl.
The function of roots of seedlings after transplanting is still very weak. At this time, the plants still need the cotyledon to continue to supply nutrients. Early cutting of the cotyledons in this period has a great influence on the normal growth of seedlings and is not conducive to the cultivation of strong seedlings. In order to prevent diseases, seedlings must be carefully observed before they enter the shed. If they find lesions on the cotyledons, they should be singled out. If the lesions are small or there is only one lesion, the lesions can be cut off directly, but Never cut off all cotyledons so as not to affect seedling growth. Covered with plastic film, it is necessary to seal the membrane with soil; spray a broad-spectrum fungicide such as chlorothalonil and thiophanate methyl.
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