According to the text, judge the item from. Agronomists need...
Agronomists need to be aware of in what manners climate and other environmental factors affect the crop and also how to grow weeds, insects, fungi and other crop pests.
O erro está no final da frase "how to grow weeds, insects, fungi and other crop pests"
O verbo "to grow" traz a ideia de cultivar ervas daninhas, insectos, fungos e outras pragas agrícolas.
É justamente o contrário, deveria ser usado o "to control" (controlar)