Diseases

Ascochyta blight

Ascochyta

Ascochyta blight is a group of fungal plant diseases characterized by the appearance of spots with punctate sporulation on leaves, stems, and pods. The disease significantly reduces seed germination and crop productivity, causing yield losses of up to 50% or more.

Mentioned in descriptions 821 varieties reference book.

Ascochyta blight manifests as spots of varying color — from light brown with a dark rim to dark brown with a depressed center. A characteristic diagnostic sign of the infection is the presence of small black dots in the center of the spots, called pycnidia. The infection affects the above-ground organs of plants, leading to thinning of seedlings, stem breakage, and underdevelopment of fruits.

The development of the pathogen depends on the presence of infection in the soil, on plant residues or seeds, as well as on environmental conditions. Optimal conditions for the fungus are high air humidity above 90% and a temperature range from +16 to +25°C. Factors contributing to the spread of the disease include prolonged rains, dense sowing, and excessive nitrogen nutrition, while temperatures above +30°C slow down or stop the development of the disease.

The assessment of variety resistance in variety trials is carried out on an artificial or provocative infection background created by irrigation and regulation of plant density. During the breeding process, the degree of organ damage, yield stability under different infection loads, and plant homeostaticity are analyzed, i.e., their genetic ability to maintain productivity when exposed to the pathogen and environmental stress factors.

Sources10

Breakdown by crop

Ascochyta blight of pea 114 Ascochyta blight of chickpea 46 Ascochyta blight of soybean 25 Ascochyta blight of fava bean 19 Ascochyta blight of fava bean 14 Ascochyta blight of faba bean 11 Ascochyta blight of cucumber 9 Ascochyta blight of bean 7 Ascochyta blight of melon 4 Ascochyta blight of lentil 4 Ascochyta blight of common vetch 3 Ascochyta blight of hairy vetch 3

Found in these crops

Pea 120 Chickpea 48 Soybean 25 Tick Bean 23 Broad bean 16 Horse bean 13 Cucumber 8 Common bean 8 Lentil 4 Common vetch 3 Hairy vetch 3 Sunflower 2

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.

Smiley

Active

Pisum sativum L. · Pea

RAGT 2N S.A.S

4 records

Simona

Active

Pisum sativum L. · Pea

Lietuvos agrarinių ir miškų mokslų centras

4 records

Roch

Active

Pisum sativum L. · Pea

Poznanska Hodowla Roslin Sp. z o.o

6 records

Pirón

Active

Cicer arietinum L. · Chickpea

ITACYL (CASTILLA Y LEON)

3 records

Mikka

Active

Pisum sativum L. · Pea

NORDIC SEED

7 records

Marquis

Active

Pisum sativum L. · Pea

Van Waveren Saaten GmbH

6 records

Mandaryn

Active

Pisum sativum L. · Pea

Hodowla Roslin Smolice Sp.z o.o Grupa IHAR

4 records

Kwarta

Terminated

Vicia sativa L. · Common vetch

Danko Hodowla Roslin Sp.z.o.o.

3 records

Kazek

Active

Pisum sativum L. · Pea

Danko Hodowla Roslin Sp.z.o.o.

5 records

Hyperion

Active

Pisum sativum L. · Pea

Seminis Vegetable Seeds

6 records

Hamino

Active

Pisum sativum L. · Pea

Institut national de recherche pour l'agriculture, l'aliment (FR)/Agri Obtentions SA (FR)

4 records

Goleta

Active

Cucumis sativus L. · Cucumber

Robert Swinkels, Nunhems B.V.

5 records

Fristo

Protection expired

Pisum sativum L. · Pea

Seminis Vegetable Seeds

4 records

Ezop

Active

Pisum sativum L. · Pea

Danko Hodowla Roslin Sp.z.o.o.

4 records

Domino

Active

Phaseolus vulgaris L. · Common bean

Holland-Select Research B.V.

4 records

Dodoni

Active

Pisum sativum L. · Pea

HAO-DEMETER-Fodder Crops and Pastures Institute

4 records

Crown

Terminated

Pisum sativum L. · Pea

New Zealand Institute for Crop and Food Research Ltd

4 records

Cheyenne

Terminated

Pisum sativum L. · Pea

GAE Recherche SA (FR)

5 records

CDC Orion

Active

Cicer arietinum L. · Chickpea

Crop Development Centre

3 records

Cheremosh

Active

Glycine max (L.) Merr. · Soybean

Sonets` Viktor Andriiovych, Pylypchenko Andrii Vasylovych, Tymchenko Viktor Naumovych, Marc Ham, Andre Letourneau, Alie Leturno,

5 records

Bonprima

Active

Cucumis sativus L. · Cucumber

Rijk Zwaan Zaadteelt en Zaadhandel B.V.

6 records

Aurelia

Terminated

Vicia faba L. · Broad bean

Saatzucht Gleisdorf

5 records

Wizard

Active

Vicia faba L. · Broad bean

Wherry and Sons Ltd

5 records

Tattoo

Terminated

Vicia faba L. · Broad bean

Norddeutsche Pflanzenzucht

4 records

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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.