Quick Richard A, Cimrhakl Launa, Mojtahedi Hassan, Sathuvalli Vidyasagar, Feldman Maximilian J, Brown Charles R
Temperate Tree Fruit and Vegetable Research Unit , USDA-Agricultural Research Service , Prosser, WA.
Irrigation Agriculture Research and Extension Center , Washington State University , Prosser, WA.
J Nematol. 2020;52:1-10. doi: 10.21307/jofnem-2020-011.
Corky ringspot (CRS) is a widespread potato tuber necrotic disease caused by (TRV) infection. In the Pacific Northwest, this virus is transmitted by the stubby root nematode (SRN) within the genus . Remediating CRS affected fields is a major challenge that can be mitigated by growing plant varieties that are resistant to TRV infection. Growing alfalfa has been shown to reduce TRV levels in CRS infested fields over time but the development of a potato cultivar with these same capabilities would be of great economic benefit to potato growers. Castle Russet is a new potato clone that does not develop symptoms of CRS disease. To assess its ability to reduce soil virus load, Castle Russet, tobacco var. "Samsun NN", alfalfa var. "Vernema", and Russet Burbank potato were grown for a period of 1 to 3 months in soils containing viruliferous SRN populations at two different inoculation pressures (60 nematodes/pot and 1060 nematodes/pot) in greenhouse pot experiments. SRN population size and the presence of TRV were assessed over several months post inoculation. Results indicate that plant host and length of exposure significantly influence SRN population dynamics, whereas the TRV infection status of bait plants was significantly affected by both of these factors as well as inoculation pressure. These results suggest that both alfalfa var. "Vernema" and Castle Russet are resistant to TRV infection and may potentially be used to eliminate the virus from fields affected by CRS. Corky ringspot (CRS) is a widespread potato tuber necrotic disease caused by (TRV) infection. In the Pacific Northwest, this virus is transmitted by the stubby root nematode (SRN) within the genus . Remediating CRS affected fields is a major challenge that can be mitigated by growing plant varieties that are resistant to TRV infection. Growing alfalfa has been shown to reduce TRV levels in CRS infested fields over time but the development of a potato cultivar with these same capabilities would be of great economic benefit to potato growers. Castle Russet is a new potato clone that does not develop symptoms of CRS disease. To assess its ability to reduce soil virus load, Castle Russet, tobacco var. “Samsun NN”, alfalfa var. “Vernema”, and Russet Burbank potato were grown for a period of 1 to 3 months in soils containing viruliferous SRN populations at two different inoculation pressures (60 nematodes/pot and 1060 nematodes/pot) in greenhouse pot experiments. SRN population size and the presence of TRV were assessed over several months post inoculation. Results indicate that plant host and length of exposure significantly influence SRN population dynamics, whereas the TRV infection status of bait plants was significantly affected by both of these factors as well as inoculation pressure. These results suggest that both alfalfa var. “Vernema” and Castle Russet are resistant to TRV infection and may potentially be used to eliminate the virus from fields affected by CRS.
Corky环斑病（CRS）是一种由烟草脆裂病毒（TRV）感染引起的广泛传播的马铃薯块茎坏死病。在太平洋西北部，这种病毒由毛刺线虫属（SRN）内的短根线虫传播。修复受CRS影响的田地是一项重大挑战，种植对TRV感染具有抗性的植物品种可以缓解这一问题。研究表明，随着时间的推移，种植苜蓿可降低CRS侵染田地中的TRV水平，但培育具有相同能力的马铃薯品种将对马铃薯种植者具有巨大的经济效益。Castle Russet是一种新的马铃薯克隆品种，不会出现CRS病症状。为了评估其降低土壤病毒载量的能力，在温室盆栽试验中，将Castle Russet、烟草品种“Samsun NN”、苜蓿品种“Vernema”和褐皮马铃薯在含有带毒SRN种群的土壤中种植1至3个月，设置两种不同的接种压力（每盆60条线虫和每盆1060条线虫）。在接种后的几个月内评估SRN种群大小和TRV的存在情况。结果表明，植物宿主和暴露时间显著影响SRN种群动态，而诱饵植物的TRV感染状况受到这两个因素以及接种压力的显著影响。这些结果表明，苜蓿品种“Vernema”和Castle Russet都对TRV感染具有抗性，可能可用于从受CRS影响的田地中消除该病毒。Corky环斑病（CRS）是一种由烟草脆裂病毒（TRV）感染引起的广泛传播的马铃薯块茎坏死病。在太平洋西北部，这种病毒由毛刺线虫属（SRN）内的短根线虫传播。修复受CRS影响的田地是一项重大挑战，种植对TRV感染具有抗性 的植物品种可以缓解这一问题。研究表明，随着时间的推移，种植苜蓿可降低CRS侵染田地中的TRV水平，但培育具有相同能力的马铃薯品种将对马铃薯种植者具有巨大的经济效益。Castle Russet是一种新的马铃薯克隆品种 , 不会出现CRS病症状。为了评估其降低土壤病毒载量的能力，在温室盆栽试验中，将Castle Russet、烟草品种“Samsun NN”、苜蓿品种“Vernema”和褐皮马铃薯在含有带毒SRN种群的土壤中种植1至3个月，设置两种不同的接种压力（每盆60条线虫和每盆1060条线虫）。在接种后的几个月内评估SRN种群大小和TRV的存在情况。结果表明，植物宿主和暴露时间显著影响SRN种群动态，而诱饵植物的TRV感染状况受到这两个因素以及接种压力的显著影响。这些结果表明，苜蓿品种“Vernema”和Castle Russet都对TRV感染具有抗性，可能可用于从受CRS影响的田地中消除该病毒。
