Colletotrichum Species on Cultivated Solanaceae Crops in Russia

Abstract

Colletotrichum species are the causal agents of potato and tomato diseases, such as black dot and anthracnose. Several new species and species complexes were recently established. Thereby, a reassessment of the genus diversity is required. The study revealed two species, Colletotrichum coccodes and Colletotrichum nigrum, as Russia’s main disease agents of cultivated Solanaceae plants. Black dot and anthracnose in potato were caused exclusively by C. coccodes, whereas the same diseases in tomato, eggplant, and pepper were predominately caused by C. nigrum. However, one isolate of C. coccodes was also identified as an agent of the tomato disease. Five potentially hybrid isolates were discovered. Morphological examination and pathogenicity assessment revealed no significant differences between the two Colletotrichum species. All isolates were sensitive to the fungicides azoxystrobin, difenoconazole, and thiabendazole, which are currently used in agriculture. This is the first report of the occurrence of C. nigrum in Russia.

First report of Colletotrichum nigrum causing tomato anthracnose in Serbia

“…Pathogen C. nigrum has been reported on tomatoes in New Zealand, the USA, China, and Russia (Liu et al 2013;Rivera et al 2016;Yarmeeva et al 2023). However, it can also be a significant pathogen on https://doi.org/10.17221/14/2024-PPS Capsicum annum, Cichorium intybus, Fragaria sp., Helianthus tuberosus, and Salvia gregii (Liu et al 2013;Jayawardena et al 2021).…”

Potato black dot, a tricky disease caused by Colletotrichum coccodes in Inner Mongolia of China

“…The initial denaturation at 94°C for 3 min; 35 cycles and an additional extending step at 72°C for 3 min. The amplification cycles were 94°C for 30 s, 55°C for 30 s and 72°C for 45 s for ITS1/ITS4 primers; and the amplification cycles were 94°C for 30 s, 60°C for 30 s and 72°C for 30 s for GDF‐1/GDR‐1 primers (Yarmeeva et al., 2023). The obtained sequences were analysed using BLAST against the NCBI online database, and the phylogenetic tree was constructed using the neighbour joining method in the MEGA 7.0 software.…”

“…The aims of the work were to clarify the taxonomy of pathogen for potato black dot in Inner Mongolia of China and symptomatic tubers from field were collected and the pathogen strains were isolated and identified through morphology and molecular characteristics, and pathogenicity test was also conducted. and the amplification cycles were 94°C for 30 s, 60°C for 30 s and 72°C for 30 s for GDF-1/GDR-1 primers (Yarmeeva et al, 2023). The obtained sequences were analysed using BLAST against the NCBI online database, and the phylogenetic tree was constructed using the neighbour joining method in the MEGA 7.0 software.…”