What are the key points of sweet corn cultivation and management techniques?
How should sweet corn be managed after planting? Please advise. Sweet corn should be harvested at the tender ear stage within 20-30 days after pollination; for supersweet corn, within 20-25 days after pollination; for ordinary sweet corn and enhanced sweet corn, it can be a few days later. If processing canned corn, it can be harvested 1-2 days earlier; if selling fresh tender corn, it can be harvested 1-2 days later. It can also be based on variety characteristics...
How should sweet corn be managed after planting? Please advise.
Sweet corn should be harvested at the tender ear stage within 20-30 days after pollination; for supersweet corn, within 20-25 days after pollination; for ordinary sweet corn and enhanced sweet corn, it can be a few days later. If processing canned corn, it can be harvested 1-2 days earlier; if selling fresh tender corn, it can be harvested 1-2 days later. It can also be based on variety characteristics: pull and taste some ears, and as long as they have reached the flavor they should have, harvesting can begin according to this standard. Sweet corn fruit can be kept fresh for 5 days at 16°C, but only 1-2 days at 29°C. At 35°C, the sugar content noticeably decreases in about 12 hours, and it loses its commercial value. Therefore, after harvesting sweet corn, it is essential to shorten transport time, or adopt cooling storage methods.
Because sweet corn is high in sugar, it is quite favored by the insect family. The main ones include: corn borer, armyworm, scarab beetle, thrips, aphids, etc. In the Sichuan region, during the fruit ripening period, stink bugs (commonly called "fart bugs") mainly occur. They cause the most serious damage on the ears; the affected corn kernels become hard, turn white or yellow, and develop poorly. They mostly fly in from other corn fields. Stink bug pests are highly mobile and relatively difficult to control. For control, pesticides such as Nongdile, bifenthrin (Tianwangxing), and fipronil can be used.
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