Question

Systemic pesticides in solution are sprayed directly onto the leaves of plants. The pesticide is absorbed into the leaves. Insects that feed on the stems, shoots or leaves of the plants which have grown after spraying are killed. Use your knowledge of plant transport systems to suggest how the insects are killed. ​

Answer 1

Systemic pesticides are absorbed into the leaves and then transported through the plant's vascular system to other parts of the plant, including the stems, shoots, and leaves. As insects feed on the plant's tissues, they ingest the pesticide along with the plant's sap. The pesticide disrupts the nervous system and other physiological processes of the insects, ultimately killing them.