Resolution of Strawberry Virus Complexes. V. Experiments with Viruses 4 and 5.

摘要: Aphids (Capitophorus fragariae Theob.) allowed to feed for several days on a strawberry plant infected with yellow-edge transmitted two virus fractions. The isolation and properties of one (virus 1) have been described previously. other 2) was separated by transferring the aphids fresh indicators after 24 hr. Virus 2 retransmitted infection feeding periods hr. or more persisted in vector days. There is some evidence that it itself complex viruses which can be further. On Fragaria vesca produced chlorotic spotting, slight marginal chlorosis leaves cupping leaflets. Royal Sovereign young leaves. On 1 together symptoms thus shown caused resolved means aphis vector.