The main ingredient of lime sulfur is calcium polysulfide, which has the ability to infiltrate and erode pathogenic bacteria cells and pests. It can form a layer of protective film on the surface of plants to protect them. The spraying effect is best before or at the onset of the disease. The tanning method for the lime sulfur mixture is: 1 Prepare ready-to-use lime, sulfur powder, water and two buckets, two cauldrons, etc. in a ratio of 1:2:10. 2 Pour enough water into a large pot, heat it to a boil, and stir the pre-weighed portion of lime in a saucepan to dissolve it thoroughly. 3 Add water in another cauldron, stir 2 parts of sulfur powder and add it to the lime pot at one time. Use an emergency fire to make the mixture. Stir in 4 sides and keep it for 50-60 minutes after boiling. When the solution in the pot is dark brown red, stop the fire. 5 filter. After filtration, the solution was purple-black and the residue was yellow-green. The lime sulfur used in this method is generally 23-26 Baume. The method of determining the lime sulfur mixture by soil method is to find a white transparent glass bottle containing about 0.5 kg of water and mark the water level line, then pour out the water, and put the lime sulfur mixture to the water level line. , Weigh the weight, and finally calculate the dose of yttrium stone-sulfur mixture agent, the formula is: (lithium sulphur mixture weight-water weight-weight of a bottle) 115.

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