Prunus-padus
Guides
Rhopalosiphum padi
bird cherry-oat aphid, oat-bird cherry aphid, apple-grain aphid
Rhopalosiphum padi is a globally distributed aphid species and major pest of temperate cereal crops. It exhibits a complex life cycle involving host alternation between a woody primary host (Prunus padus, bird cherry) and herbaceous secondary hosts including barley, oats, wheat, and other grasses. The species is the principal vector of barley yellow dwarf virus (BYDV) and several other economically important plant viruses. Unlike some cereal aphids, it does not inject toxins while feeding, so direct damage from feeding is generally less severe than virus transmission losses.