Pests of the Iris x hybrida hort. in the Nikitsky Botanical Gardens

Abstract

The article presents the results of an assessment of the phytosanitary condition of the hybrid iris cultivars of the NBG–NSC collection, the dominant pest species have been identified and specified, the degree of their harmfulness has been established, and the nature of the damage depending on the phenological state of plants has been described. Research methods: The pest species composition was studied by visual inspection of generative and vegetative organs of plants 1 time in 7-10 days. The degree of harmfulness was assessed on a 3- point scale. Results and discussion. The dominant species of pests of irises were green rose chafer Tropinota hirta Poda, rose chafer Cetonia aurata L. , undulating flea beetle (Phyllotreta nigripes F. ), which damages leaves, leaf beet aphid Aphis fabae Scopola belonging to the orders from the class Insecta Coleoptera, Hemiptera and two representatives from the class Gastropoda Pulmonata – species of gastropods Helix albescens  (Rossmässler, 1839) family Helicidae and Parmacella ibera (Fischer, 1856) family Parmacellidae