Burgonya-fajtajelöltek fitoftóra (Phytophthora infestans) ellenállóságának vizsgálata provokációs kísérletben, 2022


  • Blanka Kovács National Food Chain Safety Office, e-mail: kovacsbl@nebih.gov.hu (corresponding author)
  • László Gergely National Food Chain Safety Office, e-mail: gergelyl@nebih.gov.hu
  • Attila Kristó National Food Chain Safety Office, e-mail: kristoa@elbc.hu


potato varieties, testing for resistance, Phytophthora infestans, integrated pest management, variety registration


Potato late blight caused by Phytophthora infestans is the most devastating disease worldwide. Blight-resistant cultivars may potentially play an important role in the IPM of potatoes. In Hungary, the official VCU (Value for Cultivation and Use) trials aiming the variety registration are carried out by the National Food Chain Safety Office (Nébih) including resistance tests against the major potato diseases. This paper provides the latest results on the foliar resistance of potato candidate varieties to late blight agent. In 2022 four domestic candidate varieties (Red River, Hunor, Balatoni sárga, Golden River), two registered cultivars (Désirée, Agria), and two check cultivars (the highly susceptible Cleopatra and the resistant White Lady) were assessed using a whole-plant inoculation technique under walk-in plastic tunnel, in a microplot trial with two replications. As an inoculum, a Polish P. infestans isolate (MP 1548) with complex race character ( was applied spraying a suspension of 20-25.000 sporangia/ml on the foliage of genotypes at the 12-14-leaf stage. Disease severity was tested on a 1-10 scale of increasing susceptibility estimating the infected leaf area compared with the entire foliage surface (infected leaf area %). Of the genotypes tested Balatoni sárga and Golden River candidate varieties proved to be resistant showing hypersensitive reaction (HR) and no lesions while infection rate of the highly susceptible check cv Cleopatra was 65 % producing intensive sporulation. Candidate variety Red River performed as a mid-susceptible genotype (inf.rate: 22,5%). Additionally, infection rate of the genotypes Désirée, Agria and Hunor were 32,5, 35,0 and 42,5 %, respectively rendering them susceptible varieties. Based on the 2009/128 EK directive aiming a 50 % reduction of pesticide use by 2030, the above-mentioned resistant cultivars, in case of registration, may play an important role in the IPM of potato.


Campbell, H., Wale, S., Jessiman, I., Nevison, I., Vernon, T. and Lees, A. 2019. Research Project Report, Independent Variety Trials 2018, Report No. 2019/12. AHDB.

Gergely L. 1999. Burgonyafajták lomb- és gumóellenállósága a burgonyavésszel (Phytophthora infestans (Mont.) de Bary) szemben. Növényvédelem 35. 307-310.

Gergely, L., Lönhárd, M. and Proksza P. 2003a. Durability of dual resistance of potato varieties to late blight (Phytophthora infestans (Mont.) de Bary) and common scab (Streptomyces scabies (Thaxt,) Waksman et Henrici). Acta Phytopath. Entom. Hung. 38. 1-6.

Gergely, L. 2003b. Field resistance of registered potato cultivars to late blight agent, Phytophthora infestans. Georgikon for Agriculture 14(2). 69-77.

Gergely L. 2004. Burgonyafajták rezisztenciavizsgálata fitoftóra- (Phytophthora infestans (Mont.) de Bary) fertőzéssel szemben és egyes környezeti tényezők hatása a betegségellenállóságra. PhD értekezés, Veszprémi Egyetem 94.

Grünwald, N. J., Romero Montes, G., Lozoya Saldana, H., Rubio Covarrubias, O. A. and Fry, W. E. 2002. Potato late blight management in the Toluca valley: Field validation of SinCast modified for cultivars with high field resistance. Plant Disease 86. 1163-1168.

Haverkort, A. J., Boonekamp, P. H., Hutten, R., Jacobsen, E., Lotz, L. A. P., Kessel, G. J. T., Vossen, J. H. and Visser, R. G. F. 2016. Durable late blight resistance in potato through dynamic varieties obtained by cisgenesis: scientific and societal advances in the DuRPh project. Potato Research 59(1). 35-66.

Newberry, F., Qi, A. and Fitt, B. D. 2016. Modelling impacts of climate change on arable crop diseases: progress, challenges and applications. Current opinion in plant biology 32. 101-109.

Plich, J., Tatarowska, B., Lebecka, R., Sliwka, J., Zimnoch-Guzowska, E. and Flis, B. 2015. Rlike gene contributes to resistance to Phytophthora infestans in Polish potato cultivar Bzura. Am. J. Potato Res. (online publ. DOI 10.1007/s 12230-015-9437-9)

Rietman, H., Bijsterbosch, G., Cano, L. M., Lee, H. R., Vossen, J. H., Jacobsen, E., Visser, R. G. F., Kamann, S. and Vleeshouwers, V. G. A. A. 2012. Qualitative and quantitative late blight resistance in the potato cultivar Sarpo Mira is determined by the perception of five distinct Rx RL effectors. Mol. Plant-Microbe Interactions 25(7). 910-919.