Diseases
Phytophthora infestans
Late blight is a dangerous disease of solanaceous crops caused by an oomycete, which manifests as the appearance of spots on leaves, stems, and tubers. The development of the disease is triggered by high humidity and moderate temperatures, which can lead to significant crop losses.
Mentioned in descriptions 6 798 varieties reference book.
Affected plants develop dirty-brown spots, often accompanied by a whitish mold on the underside of the leaf, while elongated dark-brown spots appear on the stems. Tubers show hard, sunken brown spots, and the internal tissue exhibits a characteristic rust-brown discoloration upon cutting.
Epiphytotics develop under conditions of high air humidity around 90% and alternating warm days with cool nights. The presence of free moisture, such as dew or fog, is a critical factor for rapid spore germination, which allows the infection to spread across the field in 10–15 days.
In breeding, a distinction is made between specific vertical resistance, controlled by R-genes, and field horizontal resistance, which is considered more reliable due to its polygenic nature and ability to slow down pathogen development. Varieties are evaluated using a 9-point scale; however, the resistance level of the foliage does not always coincide with that of the tubers, requiring comprehensive analysis during variety testing.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Gerbera jamesonii Bolus ex Hook. f. · Barberton daisy
Rozenoord NV (BE)
Solanum tuberosum L. · Potato
SAKA PFLANZENZUCHT GBR
Solanum lycopersicum L. · Tomato
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Begonia L. · Begonia
REVELL| John Revell
Solanum tuberosum L. · Potato
CHEREDNICHENKO LIUBOV MYKOLAIVNA, TAKTAIEV BORYS ANATOLIIOVYCH, TOMASH ANATOLII IVANOVYCH, BORZYKH OLEKSANDR IVANOVYCH, KUPRIIANOVA TETIANA MYKOLAIVNA, BONDARCHUK ANATOLII ANDRIIOVYCH, ZAKHARCHUK NATALIIA ANATOLIIVNA, FURDYHA MYKOLA MYKOLAIOVYCH
Solanum tuberosum L. · Potato
Balashova Halyna Stanislavivna, Sobran Vasyl Mykhailovych, Bondarchuk Anatolii Andriiovych, Tymko Liudmyla Volodymyrivna, Abdurahimova Tamara Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Iva
Solanum tuberosum L. · Potato
INCONNU (FR)
Glycine max (L.) Merr. · Soybean
KING AGRO
Calluna vulgaris (L.) Hull · Common heather
MAASSEN| Franz Maassen / CANDERS| Gerd Canders
Solanum lycopersicum L. · Tomato
Vreugdenhil Breeding & Seeds B.V.
Solanum lycopersicum L. · Tomato
Dutch American Plantbreeders Corp.
Solanum tuberosum L. · Potato
Zelia Aureliia Heorhiivna, Bondarchuk Anatolii Andriiovych, Kozun` Ihor Ivanovych, Tymko Liudmyla Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Andriienko Tetiana Mykhailivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Ivanovych,
Solanum lycopersicum L. · Tomato
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Solanum lycopersicum L. · Tomato
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Solanum lycopersicum L. · Tomato
Vreugdenhil Breeding & Seeds B.V.
Solanum tuberosum L. · Potato
Voitseshyna Nataliia Ivanivna, Zholudenko Oksana Vladyslavivna, Mel`nyk Pavlo Oleksiiovych, Ostrenko Mykhailo Volodymyrovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Nazar Stefaniia Hryhorivna, Osypchuk Andrii Antonovych,
Solanum lycopersicum L. · Tomato
Maren Shutte, Ad Barten,
Solanum tuberosum L. · Potato
E. Nacheva, G. Pevicharova, V. Petkova, H. Samaliev
Solanum lycopersicum L. · Tomato
Bayer Holland B.V.
Solanum lycopersicum L. · Tomato
INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR
Malus domestica (Suckow) Borkh. · Apple
Fischer Manfred
Solanum lycopersicum L. · Tomato
PETOSEED CO
Medicago sativa L. · Alfalfa
W-L Research
Solanum tuberosum L. · Potato
Riazantsev Vasyl` Borysovych, Voitseshyna Nataliia Ivanivna, Mel`nyk Pavlo Oleksandrovych, Razkevych Mykola Pylypovych, Ostrenko Mykhailo Volodymyrovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Podhaiets`kyi Anatolii Adamovych, Nazar Stefan