How was citrus tristeza virus isolated?

Two isolates of the T68 genotype of citrus tristeza virus (CTV) were derived from a common source, GFMS12, by single aphid transmission.

Is transmission vector citrus tristeza a virus?

Abstract. Citrus tristeza virus (CTV) is transmitted by several aphid species in a semi-persistent manner with Toxoptera citricida, the brown citrus aphid (BrCA), being the most efficient. As yet, the molecular interactions between the virus and its aphid vectors have not been determined.

Where is citrus tristeza virus found primarily?

Tristeza virus is spread through budding and grafting or by aphids feeding on citrus. The melon aphid, Aphis gossypii, is the vector for all tristeza isolates (types) found in California; it does not however, transmit all isolates equally well.

Which of the following is an economically important viral disease of citrus trees?

Citrus tristeza virus (CTV) is probably the most economically important virus disease of citrus in the world, having killed more than 50 million trees on sour orange rootstock, beginning with the epidemic in Argentina and Brazil in the 1930s (Lee, Baker, & Rocha-Pena, 1994).

How to detect Citrus tristeza virus (CTV)?

Survey results of Citrus tristeza virus (CTV) in Crete and detection by direct immunoprinting-ELISA method.

What is the most destructive citrus virus?

Citrus tristeza virus (CTV) is probably the most destructive citrus virus in the world. About 30 million trees on sour orange rootstocks were lost in Brazil and Argentina in the years 1940–60, 6.6 million trees in Venezuela in the 1980s, and an estimated 10 million trees in Florida and other Caribbean Basin countries.

What is the resistance to divergent citrus sudden death-associated virus (csdav)?

Resistance to the divergent CTV strain (T318A) was partial ( Soler et al., 2012 ). All trees affected by CSD host a strain of CTV and, with 99.7% association, a spherical virus denoted citrus sudden death-associated virus (CSDaV).

Can citrus trees decline so quickly?

Luckily, quick decline of citrus trees is mostly a problem of the past. The syndrome primarily affects citrus trees grafted onto sour orange rootstock. This rootstock is rarely used these days precisely because of its susceptibility to CTV.