Taxonomical composition and incidence of spring rape seed infection in the Krasnoyarsk region

The purpose of research is to study the taxonomic composition and prevalence of seed infection of spring rapeseed in the Krasnoyarsk Region. The object of the study was seeds of six varieties (Lakrits, Sibirsky, Nadezhny 92, Sirius, Campino, Heros) of the 2022 harvest, obtained in industrial crops in the Sukhobuzimo, Uzhur and Balakhta Districts of the Krasnoyarsk Region. The average prevalence of seed infection across samples was 29.3 %. The minimum prevalence of seed infection was observed in the Nadezhny 92 variety (10.6 %), the maximum in the Sirius and Heros varieties (46.3 and 44.4 %, respectively). In the structure of the pathocomplex, representatives of the р. Alternaria are in the first place (48.4 % of the total number of isolated isolates), representatives of the р. Fusarium (33.4 % of the total number of isolated isolates) are in the second place, in the third place there are pathogens of seed mold (18.2 % of the total number of isolated isolates), represented by р.р. Penicillium, Cladosporium, Aspergillus and Rhizopus. Bacterial infection was isolated in a single case. The prevalence of seed infection and the structure of the pathocomplex depended statistically significantly on both the variety and the geographic origin of the seeds. The lowest prevalence of infection (16.2 %) was observed in seeds produced in the Sukhobuzimo District, the highest in seeds produced in the Balakhta District (38.0 %). For all varieties, except for the Sibirsky variety, a statistically significant negative relationship was noted between the prevalence of Alternaria-Fusarium infection and germination energy (r = -0.908, p function show_eabstract() { $('#eabstract1').hide(); $('#eabstract2').show(); $('#eabstract_expand').hide(); }