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57:. Aphids are among the most destructive insect pests on cultivated plants in temperate regions. About 4,400 species of 10 families are known, varying in length from 1 to 10 mm (0.04 to 0.4 in). Around 250 species are serious pests for
134:. Also, in contrast to many taxa, species diversity is much lower in the tropics than in the temperate zones. They can migrate great distances, mainly through passive dispersal by riding on winds. For example, the currant lettuce aphid (
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in this way. Aphids have also been spread by human transportation of infested plant materials. Aphids are the only animals known to synthesise
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Aphids are distributed worldwide, but are most common in
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69:. Natural enemies include predatory
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65:as well as an annoyance for
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18:Portal:Insects
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103:crab spiders
71:lady beetles
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150:carotenoids
142:New Zealand
111:Chrysopidae
59:agriculture
52:superfamily
107:Neuroptera
75:Coleoptera
55:Aphidoidea
44:greenflies
40:plant lice
91:Syrphidae
67:gardeners
146:Tasmania
123:and the
63:forestry
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87:Diptera
48:insects
35:Aphids
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