barley yellow dwarf is caused by

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Joshua Ruecker

Barley yellow dwarf is caused by a virus of the Luteovirus group, and is spread, or vectored, by aphids. In Pennsylvania, four aphid species are known to vector the virus, including the oat birdcherry aphid (Rhoplasiphum padi), the corn leaf aphid (R. ... The virus that causes barley yellow dwarf is spread by aphids.

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