Promising for landscaping perennial phloxes varieties of the ARHIBAN collection

Abstract

The article focuses on the possibility of introducing into urban landscaping only varieties of perennial phlox resistant to diseases. The data of phloxes damage of the ARHIBAN collection by the main fungal diseases causing leaves blotch, are given (pathogens: Erysiphe cichoracearum, Phyllosticta decussatae, Septoria phlogis, Cercospora omphacodes and Alternaria sp.). Based on the results of many years of research, including those favorable for the development of fungal diseases in recent years, the resistance of phloxes varieties to them has been estimated. When placing the plants Phlox subulata with creeping shoots on elevated areas they had no signs of disease lesions. Of the phlox with erect shoots, the varieties of Ph. maculata (‘Rosalinde’, ‘Shneepyramide’, ‘Delta’) were more resistant to diseases than most Ph. paniculata. The most resistant, medium-resistant and susceptible varieties of Ph. paniculata to the group of fungal diseases were revealed. The most resistant to disease varieties of this species were recommended for landscaping in the Moscow region (‘Creme de la Crème’, ‘David’, ‘Hochgesang’, ‘Peppermint Twist’, ‘Wilhelm Kesselring’ ‘Anya Gaganova’, ‘Batik’, ‘Belyy Biryulevskiy’, ‘Golub’ Mira’, ‘Kiyev Prazdnichnyy’, ‘Rozovyy Bordyurnyy’, ‘Uspekh’). It was concluded that it is possible to use in landscaping medium-resistant varieties to diseases with all the agrotechnical measures limiting the development of diseases.