Diseases
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.
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.
Pisum sativum L. · Pea
Vlasta Lukachikova, Edita Kraicheva, Dzhozef Stefanka, Zdenek Slamena, Khukhlaiev Ivan Ivanovych, Sichkar V'iacheslav Ivanovych,
Glycine max (L.) Merr. · Soybean
STINE SEED Co, USA
Pisum sativum L. · Pea
Thomas Blumtritt
Pisum sativum L. · Pea
Lochow-Petkus GmbH (DE)
Vicia sativa L. · Common vetch
Danko Hodowla Roslin Sp.z.o.o.
Glycine max (L.) Merr. · Soybean
Gerardo Bartolome
Vicia faba L. var. minuta (hort. ex Alef.) Mansf. · Tick Bean
RAGT 2n, FR
Vicia faba L. var. minuta (hort. ex Alef.) Mansf. · Tick Bean
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Cicer arietinum L. · Chickpea
Instituto Nacional De Investigasao Agraria (PT)
Glycine max (L.) Merr. · Soybean
Stine Seed Company
Pisum sativum L. · Pea
Danko Hodowla Roslin Sp z.o.o. (PL)
Glycine max (L.) Merr. · Soybean
Semences Prograin Inc
Vicia faba L. · Broad bean
Norddeutsche Pflanzenzucht Hans-Georg Lembke KG
Capsicum annuum L. · Bell pepper
Enza Zaden Beheer B.V.
Pisum sativum L. · Pea
Skyts`kyi Vitalii IUriiovych, Hrytsai Nadiia Petrivna, Lysohor Ol`ha Dmytrivna, Ivanova Zinaida Fedorivna, Stepanova Tamara IEhorivna, Shevchenko Anatolii Mykhailovych,
Pisum sativum L. · Pea
Toft Plant Breeding APS
Pisum sativum L. · Pea
Toft Plant Breeding APS
Glycine max (L.) Merr. · Soybean
MALYSh LIDIYa KARPOVNA / RYaZANTSEVA TAT'YaNA PETROVNA / BELYaEVA GALINA NIKOLAEVNA / DYMOVA ALEKSANDRA PETROVNA / MEL'NIKOVA EVGENIYa NIKOLAEVNA / FOMENKO NATAL'Ya DMITRIEVNA / MALYShEV KONSTANTIN SERGEEVICh
Vicia sativa L. · Common vetch
South Australian Research and Development Institute
Phaseolus vulgaris L. · Common bean
Gebroeders Bakker Zaadteelt en Zaadhandel B.V.
Phaseolus vulgaris L. · Common bean
Holland-Select Research B.V.
Vicia villosa Roth · Hairy vetch
SOUTH AUSTRALIAN SEED GROWERS CO-OPERATIVE LTD
Cicer arietinum L. · Chickpea
Top Semence / U.C.C.S. (FR)
Medicago sativa L. · Alfalfa
Natura Srl