There are three commonly used notations for the concentration of pesticides used:
(1) Percent concentration
It is expressed by the percent symbol (%), that is, the number of parts of the original pesticide contained in 100 parts of the liquid medicine, powder or oil.
(2) Multiple method
It is expressed in multiples, that is, the most common multiple of the diluent (water or filling brake) added to the drug solution or powder.
(3) parts per million concentration
Expressed in ppm, that is, 100,000 parts of liquid medicine or powder. The number of parts containing the original pesticide.
Biological pesticides http://
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