Tobaccos are planted in many provinces of China. The widest planting area mainly concentrate in Yunnan, Guizhou, Hunan, Henan, Zhejiang and other provinces. The zinc sulfate department of Rech Chemical often receives inquiries from these tobacco planting areas. In planting, tobacco farmers mainly to deal with diseases as Angle spot disease, wildfire disease, climate spot and mosaic disease. [Read More]