First, the container of the pesticide Bordeaux liquid can not use the metal container, and after the sprayer has been used, it must be remembered to clean, otherwise it will be damaged by corrosion.
Second, the spraying of pesticide Bordeaux mixture must be meticulously symmetrical, it is only a fungicide based on prevention and protection.
Third, do not spray pesticide Bordeaux liquid on cloudy days, spray on the cloudy day, when there is dew, it is easy to produce phytotoxicity, so it is not appropriate to spray on cloudy days or when there is dew.
4. After the pesticide Bordeaux mixture is prepared, the polished bud knife should be immersed in the liquid for 1-2 minutes. After removing the knife, if there is dark brown copper ion on the knife, add some lime in the liquid. Water, otherwise it is prone to phytotoxicity.
5. Some aspects to be noted when mixing with other pesticides: Fruit trees sprayed with stone sulphur mixture, petroleum emulsion or rosin mixture can be used after 20 days to 1 month to use the pesticide Bordeaux mixture, otherwise phytotoxicity will occur.
6. Some fruit trees that are sensitive to pesticides and susceptible to phytotoxicity should be used with caution. When applying, refer to the sensitivity of the main fruit trees to pesticides. Such as peach, plum, apricot, cherry and other stone fruit trees, the use of Bordeaux liquid in the growing season is prone to phytotoxicity leading to defoliation, the use time and concentration, should be passed through a small area test, and then widely used.
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