A reference to insects or any other organisms which live on or inside verdure (green foliage): The planticolous aphids suck out the juices of plants for the protein in the plant sap; however, since such sap is poor in proteins, the aphids have to take up a lot of sap in order to provide their protein supply while taking in more carbohydrates than they need which results in a surplus that is excreted by the aphids as sugar.