The fruit of bergamot is like a curly bergamot, with five obvious longitudinal grooves, which will be divided into five large pulp of different sizes, and the top of it has suture lines. Melon has a smooth surface, but some varieties have rough surfaces with small sarcomas and hard thorns. The skin is green or white, the melon is white, the fiber is less, and it has a clear fragrance. Whole melon propagation is the main breeding method of bergamot. Choose high-quality bergamot to ensure no obvious wounds, frostbite and pests. The weight of bergamot is kept at about 250 grams, and then it is planted in wet sand, keeping proper temperature and humidity. The temperature was controlled at about 16℃, and after about two weeks, the tip of bergamot began to sprout. Most melons can be properly transplanted into the soil after germination. When transplanting, the buds are upward, keep a certain inclination and do a good job of management. Seed propagation begins with taking out the whole seeds from melon. After removing the seeds, the skins of the seeds are separated and the seeds are preserved. If the seeds wither, they should be eliminated as soon as possible, because the germination rate is low and the growth is weak. Then soak the high-quality seeds in warm water for 1-2 hours to germinate them. Then sow in time according to the environment, germination and other conditions. Choose plants with vigorous growth and no pests and diseases as mother plants. Then cut the branches of plants into cuttings, and add proper amount of root powder into cuttings to improve the rooting rate of cuttings. Then insert the cuttings into the cutting substrate, which should ensure sufficient fertility, normal drainage and irrigation, and be thick and soft. Controlling the cutting density, then pouring enough water and keeping the temperature at about 22℃ is a kind of propagation mode in which the outer seed coat of seeds is peeled off, which has a fast emergence speed and is suitable for collective planting and propagation. Healthy melons should be selected and germinated at about 20℃, but this method is mostly obtained by fruit farmers in practice, and the introduction of technical data is not extensive enough. Therefore, breeding tests the technical basis of fruit farmers, and it is necessary to keep warm to promote the growth and development of seedlings within one month, and it is not advisable to have too much water. At the peak of root system development, water should be supplied in time to loosen the soil to make the root system elongate. In autumn, the influence of fertilizer and water promotes flowering and fruiting. Keep the soil moist during the flowering and fruiting period, and spray nitrogen and phosphorus fertilizers at the same time to ensure adequate nutrition. Papaya chayote is a short-day crop. After it has a certain amount of nutritional growth, it begins to breed under the condition of short sunshine in autumn. The monthly average temperature is about 22℃, and the monthly sunshine hours 170 hours are suitable for bergamot to blossom and bear fruit. So in the south, it is suitable for planting in mountainous areas with cool climate. In autumn, the growth of bergamot is obviously accelerated to enter the vigorous growth period, which makes the aboveground parts of the plant grow rapidly and has many lateral branches, laying a material foundation for more flowering and fruiting. During the flowering and fruiting period, the daily transpiration is large and sufficient water and fertilizer are needed.