Translocation of Radioactive Phosphorus Injected by the Green Peach Aphid into Tobacco Plants1

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Abstract
Myzus persicae. that fed upon tobacco plants treated with radioactive phosphorus (p32) became radioactive. The tracer was found in their honeydew or feces and in or on cast skins and young born of radioactive mothers. It was also found in leaves on which the aphids had fed, where it was probably injected with the salivary secretions. The p32 inserted into the leaf by the aphids was translocated to other parts of the plant. Part of the injury to tobacco caused by these aphids may be due to injected salivary secretions absorbed and translocated by the plant.

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