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 Common bean 8 Cucumber 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.

Hardy

Active

Pisum sativum L. · Pea

Serasem S.A.S.

AT CZ DE EE FR HR +4

25 records

Orchestra

Active

Pisum sativum L. · Pea

RAGT 2N S.A.S

CZ DE EE FR SE UA

21 records

Durango

Active

Pisum sativum L. · Pea

Seminis Vegetable Seeds

HR HU NL PL UA

11 records

Kameleon

Active

Pisum sativum L. · Pea

KWS Momont, F

DE FR LT LU UA

18 records

Symbios

Active

Pisum sativum L. · Pea

RAGT 2N S.A.S

CZ DE EE FI FR LT +1

16 records

Alfetta

Active

Pisum sativum L. · Pea

INNOSEEDS

CZ DK FI NL

18 records

Eso

Active

Pisum sativum L. · Pea

TREVOR COPE SEEDS LIMITED

AT CZ UA

15 records

Madonna

Active

Pisum sativum L. · Pea

Serasem, FR

CZ DE EE LT LV UA

16 records

ES Governor

Active

Glycine max (L.) Merr. · Soybean

Patrice Jeanson

FR PL SK UA

11 records

Attractor

Active

Glycine max (L.) Merr. · Soybean

Patrice Jeanson

DE FR RO SK UA

11 records

Prophet

Active

Pisum sativum L. · Pea

LIMAGRAIN EUROPE

CZ DE PL UA

11 records

Rocket

Active

Pisum sativum L. · Pea

Toft Plant Breeding APS

DE EE FI

14 records

Ashton

Active

Pisum sativum L. · Pea

SVS HOLLAND BV

NL UA

10 records

Kareni

Active

Pisum sativum L. · Pea

SARL ADRIEN MOMONT ET FILS, FR

EE FR LT UA

15 records

Sultana

Active

Glycine max (L.) Merr. · Soybean

RAGT 2N S.A.S

AT FR UA

11 records

Ramir

Protection expired

Pisum sativum L. · Pea

J. STYCZYNSKA C/O IHAR

AT DK ES FR PL SE

11 records

Messire

Terminated

Pisum sativum L. · Pea

SERASEM RECHERCHES ET

DE DK ES FR

11 records

Ingrid

Active

Pisum sativum L. · Pea

Tina Henriksson

EE FI LT SE

11 records

Impala

Application submitted

Pisum sativum L. · Pea

Syngenta Seeds

DK ES NL

11 records

Jackpot

Active

Pisum sativum L. · Pea

Toft Plant Breeding APS

AT CZ DK

10 records

Danto

Application submitted

Pisum sativum L. · Pea

PRODANA SEED A/S - DLF SEEDS A/S

DK FR IE

9 records

Kiss

Active

Pisum sativum L. · Pea

Van Waveren, D

DE UA

10 records

Impuls

Active

Pisum sativum L. · Pea

SELGEN A.S

CZ PL UA

14 records

Aviron

Active

Pisum sativum L. · Pea

Florimond Desprez Veuve et Fils, FR

CZ FR UA

9 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.