There is a patent on a pesticide for preventing and treating plant sunburn, which mentions that a pesticide made of various raw materials can effectively control the occurrence of plant sunburn. The medicine comprises dodecyl mercaptan, ultraviolet absorber, difenoconazole, surfactant and xylene. It should be noted that this drug is only suitable for the prevention and treatment of sunburn of plants, not for tobacco itself.
In the growing period of tobacco plants, mature leaves are easy to get sunburned. For example, at the end of June, early and mid-July, the upper shed and top leaves were mature, and the "south wind fire" weather prevailed and the sun burned seriously.