Stone sulphur mixture is a common pesticide for controlling crops and fruit trees and pests, and plays a role in insecticide, acaricide and fungicide. However, the improper application or application of the stone sulphur mixture is not only inferior, but also causes phytotoxicity. The correct way is as follows:
1. Tanning of stone sulphur mixture
1, raw materials and formula: commonly used raw materials are: quicklime, sulfur, water. The formula ratio is: quicklime: sulfur: water = 1:2:10.
2, tanning method: (1) put the so-called quicklime into the container, pour the appropriate amount of hot water into a powder, and then add a small amount of hot water to stir into a milk. (2) Adjust the sulfur into a paste with an appropriate amount of water, and pour all the remaining water into the milk. (3) Boiling the lime milk, slowly adding the sulfur paste, and stirring while heating (after the addition, record the water level line, and the amount of water evaporated during the tanning process is supplemented with hot water at any time). Continue to cook for 45-60 minutes, until the solution is reddish brown, the slag turns yellow green and ceases to fire, after a little cooling, it is filtered, and the solution is the mother liquor.
3, note: the firepower should be even, so that the liquid remains boiling without spilling. You can't use a copper pot or an aluminum pot to tanning, and use a wok or pottery when tanning. The water evaporated during the tanning process should be replenished with boiling water at any time. Do not add cold water or add too much water once, and replenish it before the last 15 minutes of the reaction time.
Second, quality testing. (1) Color: The excellent stone sulphur mixture should be a transparent reddish brown solution, and the residue is less grassy green. (2) Odor: It has a strong sulfur smell. (3) It is strongly alkaline with litmus test paper. (4) The concentration is measured by Baume's specific gravity. The larger the reading, the better the quality.
Third, the calculation of the dilution factor. Weight dilution plus water multiple = (raw liquid Baume - dilution Baume) / dilution Baume.
Fourth, the object of prevention and application and concentration. Stone sulphur mixture is an insecticide, acaricide and fungicide.
Spraying with 0.3-0.5 Baume solution on wheat can control rust, powdery mildew and wheat spider. The control of cotton red spiders with 0.2-0.3 Baume spray is very effective. Generally, the winter and early spring fruit trees can be sprayed with a 3-5 degree wave concentration during the dormancy period; only 0.3-0.5 wave degrees can be used in the summer and autumn growth season. Note: Cucumber, soybean, tomato, pear, grape, peach, etc. are more sensitive and susceptible to phytotoxicity.
The stone sulphur mixture is strongly alkaline and cannot be mixed with organic phosphorus and other base pesticides, otherwise the efficacy will be greatly reduced or invalidated. The stone sulphur mixture is best used with the equipment, once used up, temporary storage should be sealed with pottery.
1. Tanning of stone sulphur mixture
1, raw materials and formula: commonly used raw materials are: quicklime, sulfur, water. The formula ratio is: quicklime: sulfur: water = 1:2:10.
2, tanning method: (1) put the so-called quicklime into the container, pour the appropriate amount of hot water into a powder, and then add a small amount of hot water to stir into a milk. (2) Adjust the sulfur into a paste with an appropriate amount of water, and pour all the remaining water into the milk. (3) Boiling the lime milk, slowly adding the sulfur paste, and stirring while heating (after the addition, record the water level line, and the amount of water evaporated during the tanning process is supplemented with hot water at any time). Continue to cook for 45-60 minutes, until the solution is reddish brown, the slag turns yellow green and ceases to fire, after a little cooling, it is filtered, and the solution is the mother liquor.
3, note: the firepower should be even, so that the liquid remains boiling without spilling. You can't use a copper pot or an aluminum pot to tanning, and use a wok or pottery when tanning. The water evaporated during the tanning process should be replenished with boiling water at any time. Do not add cold water or add too much water once, and replenish it before the last 15 minutes of the reaction time.
Second, quality testing. (1) Color: The excellent stone sulphur mixture should be a transparent reddish brown solution, and the residue is less grassy green. (2) Odor: It has a strong sulfur smell. (3) It is strongly alkaline with litmus test paper. (4) The concentration is measured by Baume's specific gravity. The larger the reading, the better the quality.
Third, the calculation of the dilution factor. Weight dilution plus water multiple = (raw liquid Baume - dilution Baume) / dilution Baume.
Fourth, the object of prevention and application and concentration. Stone sulphur mixture is an insecticide, acaricide and fungicide.
Spraying with 0.3-0.5 Baume solution on wheat can control rust, powdery mildew and wheat spider. The control of cotton red spiders with 0.2-0.3 Baume spray is very effective. Generally, the winter and early spring fruit trees can be sprayed with a 3-5 degree wave concentration during the dormancy period; only 0.3-0.5 wave degrees can be used in the summer and autumn growth season. Note: Cucumber, soybean, tomato, pear, grape, peach, etc. are more sensitive and susceptible to phytotoxicity.
The stone sulphur mixture is strongly alkaline and cannot be mixed with organic phosphorus and other base pesticides, otherwise the efficacy will be greatly reduced or invalidated. The stone sulphur mixture is best used with the equipment, once used up, temporary storage should be sealed with pottery.
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