Definition - What does Systemic Pesticide mean?
A systemic pesticide is any formulation applied to a plant (cannabis or otherwise)—directly through its foliage or indirectly to the soil—that is intended to control pests by being absorbed and transported through the plant’s vascular system.
System pesticides are an alternative to non-systemic pesticides, which are pesticides that work only by making direct contact with the pest, or those that are translaminar and move from the top of the foliage to the underside.
Hydrolife explains Systemic Pesticide
The primary target for most systemic insecticides are sucking insects such as aphids and mites, though there are systemic fungicides for the treatment of various diseases as well.
The choice of using a systemic pesticide versus a non-systemic pesticide when growing cannabis is contingent on several factors. Typically, systemic insecticides are drawn up into the plant from the roots upwards into branches, stems, and leaves. They will move easier and be more effective during vegetative stages when the plant is actively growing and when the plant is younger with less woody tissue.
On mature plants presenting symptoms of insect or disease pressure towards the canopy, a systemic pesticide may not yield the quickest results. The nature of the pest or disease will also be a significant factor, as some types of pests respond better to systemic treatment than others.
Systemic pesticides are available in organic and synthetic variations.