Sweet corn is resistant to high temperature and likes light, with sufficient light, many fruits and good quality; On the contrary, too dark results in less and poor quality. Therefore, pruning should be carried out every year to reshape the steep long branches, dead branches and dense branches of plants, so as to ensure ventilation and light transmission of branches and leaves, promote the germination of new branches, avoid the occurrence of big or small years, and be conducive to stable and high yield and improve quality. Pruning should be done after fruit picking in late spring and before spring bud germination. Sweet Horn: Also known as "Han Mu", it is a specialty tropical fruit in Yunnan low-heat valley. The climatic conditions for the growth of wild sweet corn are not suitable for planting in the north.

Distribution. Sweet corn is mainly distributed in southern Fujian, Guangdong, Guangxi, Sichuan, Yunnan and other provinces, as well as Hainan and Taiwan Province provinces. Dry slopes, dry-hot valleys, courtyards in all directions and wasteland in coastal areas are in a wild and semi-wild state, with an estimated area of less than 830 hectares. Sweet corn can reproduce sexually and asexually, suitable seeds can be washed and seedlings can hatch. After sowing, topdressing or watering should be carried out according to the growth situation to reduce direct sunlight, and a sunshade net can be built.

Spraying foliar fertilizer to control pests and diseases: Hami melon is prone to powdery mildew when it just sprouts, and 77% kesaide wettable powder should be sprayed 500 times or 75% chlorothalonil wettable powder 600 times to control it. Powdery mildew was sprayed with 20% triadimefon (Fenxiuning tablets) for 2000 times. When downy mildew and bacterial angular leaf spot are mixed, spraying 72% phenylurea manganese zinc wettable powder 800 times can effectively treat the two diseases. 0.2%-0.3% of potassium dihydrogen phosphate is added.

In autumn or spring, sow the seeds (hole sowing or drill sowing) on the prepared fertile soil and the seedbed which is easy to irrigate, then cover them with 2-3 cm sand or fine soil, and then cover them with pine needles or grass. Keep the soil moist and avoid sunlight. When the germinated seedlings grow to a height of 6 cm, move them into bags or continue to grow on seedbeds. If seeds are soaked in warm water at 25 ~ 30℃ for 5 ~ 6 hours before sowing, it is more conducive to germination.