Phytopathogenic mycobioma in organic production of raspberry (Rubus idaeus L.) cultivars J Jay and Himbo-Top

Abstract

This study presents the findings on the influence of raspberry varieties on the species composition of micromycetes in rhizosphere soil and on the vegetative organs of plants in organic production. The mycobiota of raspberry varieties Joan J and Himbo-Top was analysed during plant ontogeny and the species composition of phytopathogenic microspecies in the rhizosphere and on plant leaves was determined. It was found that the population is dominated by fungi: Septoria rubi, West, Botrytis cinerea, Pers, Aspergillus niger, V. Tiegh, Alternaria alternata, (Fr.) Keissl., Fusarium graminearum, Schwabe, regardless of the phase of plant ontogeny, which are producers of mycotoxins. The results of the study suggest that during the phase of inflorescence in the rhizosphere soil mycobiota and on the vegetative organs of raspberry plants of the Joan J and Himbo-Top varieties, the isolates of Septoria rubi and Alternaria alternata fungi are characterised by the highest competitive ability. A study of raspberry cultivars has shown a significant differentiation in the effect on the mycobiota of rhizosphere soil and vegetative organs during intensive fruiting. It was found that isolates of Aspergillus flavus, Aspergillus niger, Aspergillus oryzae and Alternaria alternate, which parasitise plants of the Himbo-Top variety, are characterised by a higher rate of radial mycelial growth and competitive ability compared to those parasitising the raspberry variety Joan J

Keywords

• raspberries
• rhizosphere
• mycobiota
• radial growth rate
• vegetative organs of plants
• isolates
• phytopathogens
• organic production