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What are the precautions for artificial pollination of Gastrodia elata
①Attention must be paid to the timing of pollen maturity; artificial pollination can only be carried out when the pollen is mature, and immature pollen must never be used for artificial pollination. ②A large needle can be used to pick up and place the pollen, but do not pierce the ovary at the base of the flower. ③Cross-pollination must be used, especially pollination between flowers of different plants of different varieties, because the seeds produced this way have strong vitality, a high propagation coefficient, and the offspring have strong disease resistance and cold resistance. ④Artificial pollination is most suitable when there is mucus on the stigma of the pistil. Pollen placed on the stigma