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In contrast, only 28% of polyphagous herbivore species had lower densities in polycultures, versus 40% with higher densities in polycultures.
Their function as polyphagous predators within orchards was recognized in the 1800's, and several species are known to prey on key tree fruit pests.
This polyphagous species is widely distributed in the Palearctic region and appears to have colonized South and North America within the last several decades.
Although these fruit flies are polyphagous , they typically show strong seasonal preferences for certain fruits.
The two-spotted spider mite and the armyworm S. exigua both are extremely polyphagous herbivores that share many host plant species, have a similar global distribution, and can occur on the same plant species.
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