Foliar nematodes of the genus Aphelenchoides on ornamental and wild plants

Foliar nematodes of the genus Aphelenchoides are not of quarantine status for the Russian Federation, though are regulated in some countries importing Russian products: China, Argentina, Turkey, Tunisia, Egypt, Morocco, Chile, Mexico, etc. In accordance with international and national phytosanitary legislation, should these nematode species be detected in imported products, appropriate phytosanitary measures may be taken (for example, return, destruction, treatment or the introduction of temporary restrictions on the import of products, including grain, from Russia), which lead to significant economic costs.

Strawberry foliar nematode Аphelenchoides fragariae (Ritzema Bos, 1890) Christie, 1932 and chrysanthemum foliar nematode Аphelenchoides ritzemabosi (Schwartz, 1911) Steiner & Buhrer, 1932 are widespread in agrocenoses of Russia and affect grain and leguminous crops. Export of products from the Russian Federation requires compliance with the phytosanitary requirements of the importing country, in particular, the absence of these pests in the products. Failure to comply with these requirements may cause serious damage to Russia’s reputation as a supplier.

The tasks of the phytosanitary service are to detect these nematode species in exported regulated products, as well as to identify them in agrocenoses. Currently, there are no methodological recommendations for detection and identification for these species.

The present work studied host plants of foliar nematodes of the genus Aphelenchoides from various regions of the Russian Federation and signs of their damage by nematodes. The lists of host plants for each species have been supplemented. Damage symptoms are illustrated with original photographs by the authors.

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