1. Corn plucking refers to the extraction of tassels from the heading stage of corn. This period is called the corn tasseling period. From the time calculation, it is the number of days from 3-5 cm from corn sowing to tassel . Corn is also known as glutinous rice, maize, glutinous rice, and corncob; it is called corn in Cantonese and is called sage in southern Fujian. It is an annual grassy herb and the world's highest grain crop.
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　　 2 , corn tassel extraction compared with the ear extraction, the time is the same or slightly earlier, generally 0-7 days, the individual varieties can differ by about 10 days.
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　　 3 , corn heading period, marking the corn from vegetative growth ( roots and stems, leaves, etc. ) to reproductive growth (flowering, results). That is, the gradual progress of vegetative growth and reproductive growth. This is the most critical period in determining corn production. It is also the period in which corn grows fastest in its lifetime, and it has the most requirements for nutrients, water, temperature and illumination. Therefore, it is a key period for using irrigation, panicle fertilizer and topdressing.
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　　 4. In corn hybrid seed production, in the corn tasseling period, in order to ensure a high hybridization rate and seed purity, a key task is artificial emasculation, that is, the male flower is removed when the female parent is about to be bred and not extracted.
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