Systemic pesticides are chemicals that are actually absorbed by a plant when applied to seeds, soil, or leaves. The chemicals then circulate through the plant’s tissues, killing the insects that feed on them. Unlike with traditional insecticides, you can’t wash or peel off systemic pesticide residues.Click to see full answer. Also, what is the best systemic insecticide? 5 Best Pesticide Reviews for Controlling Troublesome Garden Pests Product Name Rating Price Bonide 611 Annual Tree and Shrub Insect Control A $$$$ Compare N Save Systemic Tree And Shrub Drench A+ $$$ Bayer Advanced Serenade Disease Control Concentrate B $$ Spectracide 95829 Triazicide Insect Killer B $$$$$ Furthermore, how does a systemic insecticide act on the pest? A systemic pesticide is any pesticide that is absorbed into a plant and distributed throughout its tissues, reaching the plant’s stem, leaves, roots, and any fruits or flowers. Systemic pesticides are water-soluble, so they easily move throughout a plant as it absorbs water and transports it to its tissues. Beside this, what is non systemic insecticide? A non-systemic pesticide is a topical pesticide that can easily be washed off of a plant before consumption. The plant doesn’t not absorb or uptake a non-systemic pesticide through its foliage or leaves; it remains only on the exterior of the plant.How long does it take for systemic insecticide to work?Once a systemic is applied to soil, different factors influence how quickly it will move throughout the plant. In ideal conditions, expect the insecticide to be distributed in 7-14 days and up to one month for larger trees.