A plant other than the main host that is required for a pathogen or pest to complete its lifecycle. For example, the white pine blister rust pathogen needs to infect a plant in the genus Ribes before it can make a pine tree sick.
Final life stage of an insect, when it is fully formed and capable of reproducing.
The third and often largest part of an insect’s body, located closest to the tail end of the insect. It is made up of several similar-looking segments and often bears a pair of jointed, terminal appendages called the cerci.