Why can't you eat sugar cane before and after Qingming? What philosophy is implied in this?

It is said that you can't eat sugar cane before and after Tomb-Sweeping Day, because the sugar cane bought before and after Tomb-Sweeping Day is poisonous, because the sugar cane bought during this period is basically winter, and it has not yet reached the season when sugar cane really matures. In spring, the temperature rises and the rain increases, which will also lead to the mildew of sugar cane in the mud pit for winter. Molded sugarcane is very toxic and must not be eaten, as the old saying goes? Qingming sugar cane, poisonous snake? Although this is a cliche, it must make sense if the old man stayed after all.

I once read a report about eating sugar cane. Also around Tomb-Sweeping Day, I saw some people selling sugar cane nearby. I haven't eaten for a long time, so I bought it. At that time, it looked quite fresh and the sugar cane was quite thick. But when I got home, I found that the sugar cane had changed color, so I ate it directly without paying attention. But it wasn't long before I had abdominal pain and diarrhea, and taking antidiarrheal drugs didn't have much effect. Finally, I had to go to the hospital. Fortunately, it was timely and not life-threatening.

Moldy sugarcane contains a highly toxic ingredient. This ingredient is "Arthrobacter", which belongs to a kind of mold. Poisoning symptoms will appear after eating a little, usually within 10 minutes to several hours. Poisoned people will have colds, abdominal pain, diarrhea, vomiting, and some will have headaches, black eyes, diplopia and other symptoms, which are more serious.

So it must be remembered that it is best not to eat sugar cane before and after Tomb-Sweeping Day. If you really want to eat, you can pay attention to it when you buy it. If two pieces of sugarcane have flocs, don't buy any more. Don't eat when you open the hearts. Although some sugar cane looks fine on the surface, it is actually quite strong, but many of them are drugged, and the drugged sugar cane is also prone to red hearts.