Mixed pesticides have the synergistic effect, widening the scope, delaying the resistance of pests and diseases, and lower costs. Therefore, fruit farmers always use mixed pesticides in the fight against fruit trees. What are the main points of spraying pesticides on fruit trees?
Fruit trees should be mixed with pesticides to pay attention to the following three points:
First, the acidity and alkalinity cannot be mixed to prevent neutralization and reduce the efficacy. Some homosexual pesticides cannot be turbid, such as stone sulphur and Bordeaux, which are alkaline and cannot be mixed.
Second, some pesticides cannot be mixed and can only be sprayed separately. Some pesticides can be mixed and sprayed, but 2-3 are suitable. If a variety of mixing, increase the concentration, it will produce phytotoxicity.
Third, when mixing several kinds of pesticides that can be mixed, the concentration of each pesticide should be appropriately reduced to prevent the concentration of the pesticide from being too high and the phytotoxicity to occur.
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