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In addition to self-tanning, pesticide manufacturers now produce 45% crystalline stone sulphur mixture and 40% solid stone sulphur mixture, which is more conducive to storage and transportation.
Second, use technology:
1 Prevention and treatment of apple rot disease, sprayed with Baume 5 degree stone sulphur mixture or crystal stone sulphur mixture 30 times solution in winter dormancy period.
2 Prevention and control of apple powdery mildew, sprayed with 3-5 degree stone sulphur mixture in the dormant period in winter. It can also be sprayed with a crystal stone sulphur 300 times solution before flowering or 10 days after flowering.
3 Prevention and treatment of apple brown rot, sprayed with Baume 3-5 degree stone sulphur mixture during the dormant period in winter. If a crystal stone sulphur mixture is used, spray it with 120-180 times before the fruit tree is germinated or half a month after germination.
4 Prevention and control of pear scab, brown spot, brown spot and peach leaf leaf disease, powdery mildew, dormant period with Baume 3-5 degree stone sulfur mixture or crystal stone sulfur mixture 20-30 times liquid spray.
5 Control apples, pear leafhoppers (red spiders) or scale insects, before the fruit trees are germinated, spray with Baume 3-5 degree stone sulfur mixture or crystal stone sulfur mixture 25-30 times.
6 Prevention and control of wheat rust, powdery mildew and scab, sprayed with Bamei 0.3-0.5 degree stone sulphur or crystal sulphur 120-180 times before or after heading.
Three issues to be aware of when using:
1 The higher the temperature at the time of use, the more likely it is to cause phytotoxicity. When the summer temperature is above 32 °C, when the early spring temperature is lower than 4 °C, it is impossible to spray.
2 Cucumber, tomato, and beans are not sensitive to stone sulphur mixture. In the growing season of peach, plum, plum, grape, and pear, it is also impossible to spray stone sulfur mixture.
3 stone sulfur mixture has a strong alkaline, can not be mixed with alkaline pesticides, and can not be mixed with Bordeaux mixture.
4 stone sulfur mixture has a corrosive effect on the skin, it should be washed in time when splashing on the body, and the spraying equipment should be washed out in time.
The use of stone sulfur mixture to control pests and diseases should pay attention to problems
A calculation of the amount of water: the concentration of the stone sulphur mixture is expressed in terms of Baume, and the Baume degree can be measured by a Baume pycnometer. Generally, the mother liquor has a Baume degree of 20-28 degrees, and should be diluted with water when used. The amount of water can be calculated by the following formula: water weight = (mother liquid wave / after dilution of Baume degree -1) x mother liquor weight, for example: 2 kg of Baume 20 degrees mother liquor, to be diluted into Baume 0.5 degree liquid The amount of water that should be added is: (20/0.5-1) x 2 kg = 78 kg
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