Patterns of Host-Plant Use

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A continuous spectrum exists between insect species that will only feed on one plant species and others that feed on a very wide range of plants in many different families. It is usual to separate the insects into categories depending on their host-plant ranges, but it is important to recognize that no clear boundaries separate these groups and different authors use them in different ways. The categories commonly recognized are: monophagous, oligophagous and polyphagous.