| Sequestration of allomones from plants by insects is not unusual, but normally associated with monophagous or oligophagous species. |
| Acquisition of a native host-plant by an introduced oligophagous herbivore. |
| With only a few exceptions, the host plants of the oligophagous beetles are taxonomically related. |
| As serious agricultural insect pests, cotton bollworms are euryphagous insects, but oriental tobacco budworms are oligophagous insects. |
| Since most insects are monophagous or oligophagous, the distinctness of the odours of different plants often enables them to locate their specific hosts from a distance. |
| Psyllids are generally monophagous or narrowly oligophagous with respect to their angiosperm hosts. |
