Source: Agricultural Research Service


A new rapid way to test severity of the devastating citrus tristeza virus (CTV) in citrus trees has been developed by Agricultural Research Service scientists in Parlier, Calif. The results of this study were presented at the Second International Citrus Biotechnology Symposium in Catania, Italy, earlier this month.


CTV is the cause of the most economically damaging virus disease in citrus. CTV has led to the death of millions of citrus trees on sour orange rootstock worldwide, and virulent stem-pitting strains can drastically reduce fruit size, quality and production of millions of other citrus trees on tolerant or resistant rootstocks. Sour orange is generally considered the best overall rootstock (or tree stump) for citrus and is still widely used in Texas, Mexico, Central America and Mediterranean countries.


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