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Occurrence of plant parasitic nematodes on ornamental plants in São Paulo and Minas Gerais States, Brazil

The objective of this work was to report the geographic distribution, new occurrences and symptoms caused by the main species of nematodes collected from ornamental plants cultivated in the States of São Paulo and Minas Gerais, Brazil. Nematodes were extracted from 5 g of roots by centrifugation method and identified under microscope with the aid of a camera lucida for measurements. The most frequently occurring species were Meloidogyne javanica (38% of all samples), M. incognita (19%) and Helicotylenchus dihystera (11%). Among the identified species, the following associations constitute new records to Brazil: M. incognita in Gloxinia sp., Arundina graminifolia and Aptenia cordifolia; M. javanica in A. graminifolia, Hibiscus spp., Gloxinia sp., Eustoma grandiflorum, Heliconia rostrata, Graptophyllum pictum, Holmskioldia sanguinea and Exacum affine; Pratylenchus brachyurus in E. grandiflorum, Cattleya sp. and different cultivars of Lilium sp.; Helicotylenchus dihystera in E. grandiflorum, Lilium sp., Impatiens balsamina and A. cordifolia; H. multicinctus in Pachystachys lutea; H. pseudorobustus in Heliconia sp. and Cactodera cacti in Schlumbergera sp.

ISSN: 2447-536X

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