Diseases

Late blight

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.

Sources10

Breakdown by crop

Found in these crops

Potato 1 394 Tomato 276 Garden strawberry 124 Soybean 64 Bell pepper 56 Alfalfa 41 Red raspberry 34 Apple 26 Sweet chestnut 25 Citrus 22 Apple 19 Tomato 16

Varieties that feature this in their description

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.

Hitra

Active

Rubus idaeus L. · Red raspberry

4 records

Frosta

Active

Rubus idaeus L. · Red raspberry

3 records

Cavendish

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

2 records

Dunbar Standard

Active

Solanum tuberosum L. · Potato

2 records

Yunka

Active

Glycine max (L.) Merr. · Soybean

3 records

Vanda

Protection expired

Zea mays L. · Maize

2 records

Odessa

Active

Glycine max (L.) Merr. · Soybean

2 records

Lady

Terminated

Solanum melongena L. · Eggplant

2 records

Provegeto

Active

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

Proforelo

Application submitted

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

Propullus

Active

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

Prolumia

Active

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

PH5013

Active

Solanum lycopersicum L. · Tomato

Vreugdenhil Breeding & Seeds B.V.

2 records

ICIA 4

Active

Persea americana Mill. · Avocado

LUISA GALLO LLOBET

1 record

Gwen

Active

Solanum tuberosum L. · Potato

Germicopa SAS, FR

1 record

Zvizdal`

Active

Solanum tuberosum L. · Potato

Ivanenko Mykola Mykolaiovych, Siharova Dina Dmytrivna, Mel`nyk Pavlo Oleksiiovych, Plotnyts`ka Ol`ha Volodymyrivna, Tymko Mykola Hryhorovych, Andriienko Tetiana Mykhailivna, Lysak Olena Andriivna, Pysarenko Nataliia Vasylivna, Sydorchuk Svitlana Volodymyr

2 records

Zhytnytsia

Active

Solanum tuberosum L. · Potato

BONDARCHUK ANATOLII ANDRIIOVYCH, MARUDA MARYNA YURIIVNA, ROZHNIATOVSKYI ANDRII OLEHOVYCH, FURDYHA MYKOLA MYKOLAIOVYCH, TOMASH ANATOLII IVANOVYCH, OSYPCHUK ALLA ANDRIIVNA, FEDORENKO OLEKSANDR LEONIDOVYCH, TAKTAIEV BORYS ANATOLIIOVYCH

2 records

Zhuravynka

Withdrawn

Solanum tuberosum L. · Potato

Portiankin Dmytro IEvhenovych, Kozlova Liudmyla Mykolivna, Piskun Heorhii Ivanovych,

2 records

Zaviia

Active

Solanum tuberosum L. · Potato

Podhaiets`kyi Anatolii Adamovych, Zelia Aurika Hryhorivna, Plotnyts`ka Ol`ha Volodymyrivna, Honcharenko Ol`ha Petrivna, Pysarenko Nataliia Vasylivna, Tymko Mykola Hryhorovych, Lysak Olena Andriivna, Andriienko Tetiana Mykhailivna, Sydorchuk Svitlana Volod

2 records

Zheran

Application submitted

Solanum tuberosum L. · Potato

Andriienko Tetiana Mykhailivna, Dems`ka Anastasiia Kyrylivna, Muzyka Lidiia Ivanivna, Popereshniuk Valentyna Mykolaivna, Sydorchuk Vasyl` Ivanovych, Lysak Olena Andriivna, Pysarenko Nataliia Vasylivna, Plotnyts`ka Ol`ha Volodymyrivna, Mel`nyk Pavlo Oleksi

1 record

Zelenyi hai

Terminated

Solanum tuberosum L. · Potato

Sobran Vasyl Mykhailovych, Siharova Dina Dmytrivna, Mel`nyk Pavlo Oleksiiovych, Oliinyk Tetiana Mykolaivna, Ostrenko Mykhailo Volodymyrovych, Bondarchuk Anatolii Andriiovych, Taktaiev Borys Anatoliiovych, Osypchuk Alla Andriivna, Nazar Stefaniia Hryhorivn

2 records

WINALDA

Withdrawn

Solanum tuberosum L. · Potato

FRIESE MIG V.LANDBOU.

1 record

Vzirets`

Active

Solanum tuberosum L. · Potato

Hunchak Volodymyr Mykhailovych, Chabanov Andrii Semenovych, Bondarchuk Anatolii Andriiovych, Tymko Liudmyla Volodymyrivna, Abdurahimova Tamara Volodymyrivna, Pysarenko Nataliia Vasylivna, Lysak Olena Andriivna, Tymko Mykola Hryhorovych, Sydorchuk Vasyl Iv

2 records

VITTORINI

Terminated

Solanum tuberosum L. · Potato

DEKKER B. (NL)

1 record

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Diseases

Powdery mildew 33 570
Fusarium wilt and blight 29 887
Viral mosaic diseases 22 022
Downy mildew 16 384
Leaf spot diseases 15 926
Rust 14 859
Verticillium wilt 12 175
Scab 12 064

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.