1? Mechanism? Urea has the effect of destroying the body wall chitin of the mites. The laundry detergent contains surfactant sodium alkylbenzene sulphonate, which can dissolve the waxy layer of the mites body wall and adhere to the above to form impervious and airtight. A layer of film, resulting in suffocation of locust stomata blocked. The combination of the two has the advantages of high efficiency, no pollution, convenience, and top dressing effect. 2? Preparation of detergent powder, urea, water preparation ratio of 1:3:300. When preparing, open the washing powder with hot water, then add urea and water, and stir evenly. 3? Precautions • Mix well when mixing, do not leave particles, these particles can easily cause the leaves to burn. Spray should be uniform, must spray the liquid on the locust, otherwise it does not work. Medical 3D Mask Machine,Folding Mask Making Machine,Fold Flat 3D Mask Machine,Fold Flat Facemask Machine Ningbo Dokee Mask Machine Co., Ltd. , https://www.autrendsmac.com