DEVELOPMENT OF THE BIRD CHERRY-OAT APHID RHOPALOSIPHUM PADI (LINNAEUS) (HOMOPTERA: APHIDIDAE) FEEDING ON UNFAMILIAR HOST PLANTS OF THE FAMILIES CYPERACEAE AND JUNCACEAEALLA B. VERESHCHAGINA, ELENA S. GANDRABUR AND PETER G. EFIMOV
The injuriousness of cereal aphids is determined not only by their feeding but also, indirectly, by transmitting dangerous viral infections onto both their hosts (cereal crops) and non-host plants (potato). We studied the interactions between the bird cherry-oat aphid Rhopalosiphum padi (Linnaeus) and its unfamiliar hosts which are potential carriers of viruses: 14 species of sedges of the family Cyperaceae and 5 species of rushes of the family Juncaceae. The possibility of feeding of Rh. padi is established for the first time for 9 species of Cyperaceae and 2 species of Juncaceae. The range of the aphid host plants is determined by their geographic distribution, habitats, and specific traits of vegetation as related to the trophic requirements and behavior of aphids. Based on analysis of the development parameters of Rh. padi, rushes were shown to be more favorable for its feeding than sedges. Aphids were the most numerous during the flowering of plants of both families. Aphids could reproduce up to the formation of the sexual generation on 3 species of Juncaceae: J. filiformis, L. multiflora, and L. piloza and on 4 species of Cyperaceae: C. tomentosa, C. cespitosa, C. hartmanii and C. elongata.
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