Ethephon is a widely used plant growth regulator that is easily absorbed by plants and can be incorporated into plant stems, leaves, flowers, and fruit cells. After ethephon enters the plant cells, it gradually releases ethylene through decomposition, which regulates plant growth, development and metabolism. It can increase the effective delivery, make the plants dwarf, prevent lodging, increase female flowers, promote the early fruit ripening of the crop, and advance the results. As a result, some farmers sprayed peppers, tomatoes, watermelons, melons, and melons with ethephon to promote their early maturation and redness. Spray cucumbers, pumpkins, watermelons, and other melons, increase the amount of female flowers, promote the early fruiting of melons, and produce more melons in the morning market. Spray wheat and rapeseed, increase effective tillering, make the plants dwarf, prevent lodging. Undoubtedly, spraying ethephon can increase crop yields and yields, but use ethephon-grown crop seeds as seeds, especially ethephon sprayed directly on the fruits of peppers, tomatoes, watermelons, melons, melons and other crops for ripening. The seeding of seeds is harmful and unhelpful. This is because the use of ethephon ripening to shorten the natural maturity of the crop itself, so that the fruit does not reach the ripening stage prematurely stop growth and development, resulting in the development of the embryo is not perfect, affecting the germination rate. According to experiments, natural mature crop seeds, the germination rate is generally more than 90%, and the spray rate of ethephon crop seed germination rate is only 30% to 40%, the highest not more than 50%. Therefore, any crop that has been sprayed with ethephon, especially seeds that are sprayed on the fruit, can no longer be kept as a seed, so as not to affect the production in the coming year.