青云翻译

The development of pesticide history in general has experienced three stages, namely, natural medicine era (about 19th century 7O years ago), inorganic synthetic pesticides era (about 7O years of the 19th century to the mid-4O 2O century) and the era of synthetic organic pesticides.

　 General experience of 3 historical stages of the development of the pesticide, that is, natural medicine times (about 19th century years ago), inorganic synthetic pesticide era (about 19th century era to the age of 2O century 4O medium-term) and synthetic organic pesticides era.

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　 General experience of 3 historical stages of the development of the pesticide, that is, natural medicine times (about 19th century years ago), inorganic synthetic pesticide era (about 19th century era to the age of 2O century 4O medium-term) and synthetic organic pesticides era.