1 In order to ensure the purity of hybrid seeds, in the period from the seedling stage to the heading stage, three to five strict removals of the tissues should be carried out. Special attention should be paid to the paternity, and the major plants, mutant plants, and suspected plants should be removed. , so that the system of planting plants at the same level of height.
2 The detaches shall be carried out with a touch of leaves (1 - 2 pieces). The emasculation is the key link in the seed production. The decapitulation must be thorough and leave no residue. In the late trumpet period, we can begin to depart. During the detasseling period, every day before 10 o'clock in the morning and after 5 o'clock in the afternoon, every time it is pumped 1 times, wind and rain are blocked, and the inspection is made on a branch-by-plant basis, leaving no stubs and dead corners. The tassel does not leave the field and must be taken home. In the process of emasculation, “three types of seedlings†are removed at the same time: seedlings, weak seedlings, and diseased seedlings.
3 Water and Fertilizer Management During the management of water and fertilizers, it should be noted whether the parental flowering period meets. If the male parent is earlier than the female parent, the male parent can cut the leaf (3--7 cm), remove the root (vertically cutting the lateral root from the main stem at a distance of 15-20 cm) and remove the membrane. The main wind is directed parallel to the parental surface or sprayed with 20 mg/kg of the "900" and 1% urea mixture. It is also possible to de-male the female parent earlier; the female parent is earlier than the male parent, except for the male parent 500 Aqueous potassium dihydrogen phosphate solution spray to promote its early flowering can also be cut silk processing.
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