The already cut watermelon must be stored in the refrigerator and, if possible, eat for a day.
“At room temperature, the shelf life is reduced to two to three hours,” the article says. “A cut watermelon, which has been lying for more than 24 hours even in the refrigerator, must be thrown away, because in a sweet environment, bacterial infections, including salmonell, propagate very quickly.”
You can find nitrates in watermelon only with a laboratory study. But if the watermelon has too dark with yellow or white veins, but it tastes a little bitter, it is not worth it, since it may contain nitrates and pesticides.
Context
To choose a ripe watermelon, you need to knock on it. The juicy fruit should sound evenly. If the watermelon has damaged areas, they will absorb vibration and sound.
