A pollen pathway?

摘要

The Southeast stone fruit industry has done a lot to make sure its trees are free of viruses. Growers in South Carolina and Georgia, the nursery industry and researchers at Clemson University have collaborated for years to make sure the buds and rootstocks propagated by nurseries have been tested and found free of important viruses such as prunus necrotic ringspot virus (PNRSV), prune dwarf virus (PDV) and plum pox.