NAME OF THE ORGANISM: Nepovirus nigranuli (tomato black ring virus) {Tomato black ring nepovirus} (TBRV00)

Yes

In general very few reports on nepoviruses of berries can be found, most references dating before 1995. For example, a study in a plantation with a virus-sensitive raspberry cultivar over a period of seven years showed that natural infection by TBRV resulted in a 13.6 % decrease in fruit yield but a much greater reduction in fruit size and height of the canes (EFSA, 2013; citing Taylor, Chambers and Pattullo, 1965).
The incidence of virus-infected plants generally remains localised because of limited spread by the nematode vectors (EFSA PLH, 2013).

Martin et al. (2013) report that TBRV, in mixed infection with other nepoviruses, causes diseases referred to as raspberry leaf curl, or raspberry ringspot. Damage observed depends on the cultivar. No economic impact reported in the recent years for the virus alone.
In a study in Poland Rubus idaeus and R. fruticosus were analysed for the presence of TBRV. Out of 460 samples 9 were found positive, all tested plants were asymptomatic (Dabrowska et al., 2021).

EFSA (2013) refers to Murant & Lister (1987) as part of a general statement on the impact of nepoviruses on Fragaria and Rubus. On checking, this article only relates specifically to RRV and TBRV alone or as a mixed infection on strawberry, and even then it states "with large outbreaks economic loss may...be considerable", and then proceeds to describe symptoms rather than economic impacts in sensu stricto.

Minimal to minor

Yes

No

Not candidate

Cultivation practices strongly limit this potential for impact. According to EFSA (2013), the most significant factor is certainly that efficient voluntary certification schemes for strawberry and raspberry are in place and ensure that healthy planting materials are used by growers. Additional factors contributing to a reduction of the impact are (1) the significantly shorter cycles of modern strawberry and raspberry cultivation practices (one to two seasons), which limit the potential for disease build-up, (2) the increasingly frequent use of soil-less cultivation practices, which limit the impact of nematode vectors and (3) the availability of resistant or tolerant cultivars of raspberry. As a consequence of the conjunction of these various factors, these nematode-transmitted viruses are found only occasionally in these crops and the diseases they cause are considered of minor significance by growers as illustrated during the hearing of industry experts. Current impact of these viruses (under existing regulatory framework) in Fragaria, Rubus and Ribes hosts was considered by EFSA (2013) to be minimal to minor, with low uncertainty.
The Fruit SEWG commented that voluntary certification schemes are not widely used in all EU countries. For instance, in Spain, between 60-70% of the material is certified in Fragaria, and practically nothing in Rubus and Ribes (certification started in 2024). Consequently, in absence of evidence for relevant symptoms and economic impact in the last decades, the Fruit SEWG concluded that economic impact should be considered as acceptable.