pre-emergence application

例句：

1. 1. The pre-emergence application of the herbicide iscrucial for controlling weeds before theyemerge from the soil.
   在杂草从土壤中冒出之前，使用除草剂进行预萌期应用至关重要。
2. 2. The farmers usedto apply the insecticide before thepests emerged, which greatly reduced thedamage caused by the pests.
   农民过去在害虫出现之前就施用杀虫剂，这大大减少了害虫造成的损害。
3. 3. The pre-emergenceapplication of the herbicide has beenshown to be effective in controlling the growthof certain weeds in agricultural fields.
   研究表明，在农业田里对某些杂草进行预萌期除草剂应用是有效的。