Stone sulphur mixture is a traditional mineral source pesticide. It has been used for more than 100 years. Due to its convenient material selection, low price and special insecticidal, acaricidal, bactericidal and non-resistance resistance, it has become a fruit pest. An important agent in prevention and treatment. Before the germination of the fruit tree, the stone sulphur mixture can effectively kill the overwintering pests and eggs, reduce the number of pests and diseases, and achieve twice the result with half the effort. At present, the work of clearing the garden before the germination of the fruit trees has gradually begun, and now the rational allocation of the stone sulphur mixture is The correct method of use is as follows:
First, stone sulfur mixture configuration methods and steps:
Formulation and material selection: According to the ratio of 1 part of quicklime, 2 parts of sulfur and 10 parts of water, the quicklime is preferably made of pure white block, and sulfur is suitable for powder.
1. Mix the sulphur powder with a small amount of water to form a paste-like sulphur slurry. Stir well and the better.
2. Put the quicklime in the iron bucket and dissolve it with a small amount of water (the lime dissolves more slowly when the water is over the lime block), adjust it into a paste, pour it into the iron pan and add enough water, then use Heated by fire.
3. When the lime milk is close to boiling, pour the sulfur slurry that has been adjusted in advance into the pot slowly from the side of the pot, stir while stirring, and record the water line. Prevents splashed liquid from scalding the eyes during heating.
4, then boil for 40-60 minutes on a strong fire, until the liquid is simmered to reddish brown, the slag that is removed is yellow-green, and the fire is stopped. During this period, the amount of water evaporated is used to fill the water level with hot boiling water. The amount of water to be replenished should be carried out 15 minutes before the fire is removed.
5. Cool and filter out the residue to obtain a reddish-brown transparent stone sulphur mixture. Measure and record the concentration of the original solution (the concentration is generally 23-28 degrees), if it is not stored in a glazed cylinder or altar, It can also be transported in plastic drums and stored for short periods of time.
Second, the use of stone sulfur mixture
1. The dormant period of fruit trees and pre-emergence germination are the best period for using stone sulphur mixture. The high temperature in summer is above 32 °C, and the low temperature in spring is below 4 °C.
2. The concentration should be determined according to the plant species, control objects and climatic conditions. If the concentration is too high or the temperature is too high, it will cause phytotoxicity. In early spring or winter, the spraying is generally 3-5 degrees in Baume, and the concentration in the growing season is Baume 0.1-0.5 degrees.
3. Before use, the original liquid degree must be measured with a Baume hydrometer. Calculate the water addition and water dilution according to the required concentration. The formula for diluting the raw material per kilogram of stone sulphur mixture to the target concentration and water addition amount: water addition amount (kg) / kg/h stock solution = (stock solution concentration - target concentration) / target concentration.
4, stone sulphur mixture is best with the use, long-term storage is prone to precipitation, volatilization of hydrogen sulfide gas, thereby reducing the efficacy. It must be sealed with a layer of kerosene on the surface of the stone sulphurizer liquid when it is stored.
4, commonly used methods
(1), spray
Spraying 3-5 Baume's stone sulphur mixture before winter and early spring germination can effectively kill the wintering scale insects, mites, ulcers and other pests on the fruit trees. Spraying 0.3-0.5 Baume after the bud can control powdery mildew and rust of fruit trees.
(2), dry
The whitening agent was disposed with 0.5 kg of stone sulfur mixture, 5 kg of quicklime, 0.5 kg of salt, 0.5 kg of animal oil, and 40 kg of water. Brushing the trunk and main branches during the dormant period of the fruit tree can prevent pests such as rot, canker, and scale insects, and can also prevent freezing damage.
(3), wound treatment
The stone sulphur mixture solution can be used to reduce the infection of harmful bacteria and prevent the occurrence of rot and ulcer disease.
Third, matters needing attention
1. Use iron pot or pottery when tanning. Do not use copper pot or aluminum pot. The firepower should be even, so that the liquid remains boiling without overflowing.
2, peach, plum, plum, pear and other Rosaceae plants and Bauhinia, Acacia and other legumes sensitive to stone sulfur mixture, should be used with caution. It can be used to reduce the concentration or to use a safe period of time.
3, before use, stir well, long-term continuous use is easy to produce phytotoxicity, stone sulphur mixture is strong alkaline, can not be mixed with organic phosphorus, Bordeaux mixture and other basic pesticides, the use of two types of pesticides between 10 to 10 More than 15 days, otherwise, acid-base neutralization will greatly reduce or invalidate the drug.
First, stone sulfur mixture configuration methods and steps:
Formulation and material selection: According to the ratio of 1 part of quicklime, 2 parts of sulfur and 10 parts of water, the quicklime is preferably made of pure white block, and sulfur is suitable for powder.
1. Mix the sulphur powder with a small amount of water to form a paste-like sulphur slurry. Stir well and the better.
2. Put the quicklime in the iron bucket and dissolve it with a small amount of water (the lime dissolves more slowly when the water is over the lime block), adjust it into a paste, pour it into the iron pan and add enough water, then use Heated by fire.
3. When the lime milk is close to boiling, pour the sulfur slurry that has been adjusted in advance into the pot slowly from the side of the pot, stir while stirring, and record the water line. Prevents splashed liquid from scalding the eyes during heating.
4, then boil for 40-60 minutes on a strong fire, until the liquid is simmered to reddish brown, the slag that is removed is yellow-green, and the fire is stopped. During this period, the amount of water evaporated is used to fill the water level with hot boiling water. The amount of water to be replenished should be carried out 15 minutes before the fire is removed.
5. Cool and filter out the residue to obtain a reddish-brown transparent stone sulphur mixture. Measure and record the concentration of the original solution (the concentration is generally 23-28 degrees), if it is not stored in a glazed cylinder or altar, It can also be transported in plastic drums and stored for short periods of time.
Second, the use of stone sulfur mixture
1. The dormant period of fruit trees and pre-emergence germination are the best period for using stone sulphur mixture. The high temperature in summer is above 32 °C, and the low temperature in spring is below 4 °C.
2. The concentration should be determined according to the plant species, control objects and climatic conditions. If the concentration is too high or the temperature is too high, it will cause phytotoxicity. In early spring or winter, the spraying is generally 3-5 degrees in Baume, and the concentration in the growing season is Baume 0.1-0.5 degrees.
3. Before use, the original liquid degree must be measured with a Baume hydrometer. Calculate the water addition and water dilution according to the required concentration. The formula for diluting the raw material per kilogram of stone sulphur mixture to the target concentration and water addition amount: water addition amount (kg) / kg/h stock solution = (stock solution concentration - target concentration) / target concentration.
4, stone sulphur mixture is best with the use, long-term storage is prone to precipitation, volatilization of hydrogen sulfide gas, thereby reducing the efficacy. It must be sealed with a layer of kerosene on the surface of the stone sulphurizer liquid when it is stored.
4, commonly used methods
(1), spray
Spraying 3-5 Baume's stone sulphur mixture before winter and early spring germination can effectively kill the wintering scale insects, mites, ulcers and other pests on the fruit trees. Spraying 0.3-0.5 Baume after the bud can control powdery mildew and rust of fruit trees.
(2), dry
The whitening agent was disposed with 0.5 kg of stone sulfur mixture, 5 kg of quicklime, 0.5 kg of salt, 0.5 kg of animal oil, and 40 kg of water. Brushing the trunk and main branches during the dormant period of the fruit tree can prevent pests such as rot, canker, and scale insects, and can also prevent freezing damage.
(3), wound treatment
The stone sulphur mixture solution can be used to reduce the infection of harmful bacteria and prevent the occurrence of rot and ulcer disease.
Third, matters needing attention
1. Use iron pot or pottery when tanning. Do not use copper pot or aluminum pot. The firepower should be even, so that the liquid remains boiling without overflowing.
2, peach, plum, plum, pear and other Rosaceae plants and Bauhinia, Acacia and other legumes sensitive to stone sulfur mixture, should be used with caution. It can be used to reduce the concentration or to use a safe period of time.
3, before use, stir well, long-term continuous use is easy to produce phytotoxicity, stone sulphur mixture is strong alkaline, can not be mixed with organic phosphorus, Bordeaux mixture and other basic pesticides, the use of two types of pesticides between 10 to 10 More than 15 days, otherwise, acid-base neutralization will greatly reduce or invalidate the drug.
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