| Psyllids are generally monophagous or narrowly oligophagous with respect to their angiosperm hosts. |
| With only a few exceptions, the host plants of the oligophagous beetles are taxonomically related. |
| This is true for many insects that are oligophagous or monophagous on plants that contain characteristic chemicals. |
| 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. |
| Rearing the oligophagous Cactoblastis cactorum on meridic diets containing different nonhost proteins. |
| Sequestration of allomones from plants by insects is not unusual, but normally associated with monophagous or oligophagous species. |
