I recently learned a new thing, which I probably should have known for a long time, and that is that systemic pesticides are distributed inside the whole plant, but this movement for the vast majority of active substances occurs only in the acropetal sense, i.e. in the direction from below up. This fact could be fundamental in the use of systemic insecticides in foliar treatment in the fight against palm weevils which are known to attack the heart and even the stem of the palms. The question is