Pesticides can be classified based upon their biological mechanism function or application method. Most pesticides work by poisoning pests. A systemic pesticide moves inside a plant following absorption by the plant. With insecticides and most fungicides, this movement is usually upward (through the xylem) and outward. Increased efficiency may be a result. Systemic insecticides, which poison pollen and nectar in the flowers[citation needed], may kill bees and other needed pollinators[citation needed]. COUNT 4
QSN1 What is one way you could group pesticides? ANS1 application method QSN2 What is the main way that peticides perform their function? ANS2 by poisoning pests QSN3 In which direction do systemic pesticide generally travel through a plant? ANS3 movement is usually upward QSN4 Which parts of a plant do systemic pesticides generally attack? ANS4 pollen and nectar in the flowers