Pesticide label knowledge

After the Spring Festival, peasant friends have to prepare spring supplies. Some of the pesticide formulations available today are in English. The following is a detailed explanation of the meaning of the English symbol.
PC (percent concentration): indicates the percentage of active ingredient in the drug.
Ppm (parts per million): If 1 ppm (can also be written in ppm), it is one in a million.
EC (Effective Concentration): Concentrations that are safe for crops, such as pests, pathogens, or weeds, that can be poisoned.
LC (lethal concentration): The concentration that caused the death of the test animals, expressed in ppm.
MEC (Maximum Effective Concentration): The maximum concentration of agents that have a controlled effect on pests and is not harmful to crops.
DP (powder): fine powdered pesticides with certain specifications and contents can only be used for dusting or seed dressing, baits, etc.

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