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Histopathogenesis of Galls Induced by Subanguina radicicola on Poa annua Roots. N. Vovlas, Instituto di Nematologia Agraria, C.N.R., 70126 Bari, Italy. Plant Dis. 67:143-144. Accepted for publication 12 June 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-143.

The histopathology of galls induced on Poa annua was examined on serial sections prepared from roots infested by an English population of Subanguina radicicola. Mature galls (0.45 mm wide), characterized by a hyperplastic cortex, contained five to 10 more cell layers than healthy cortical parenchyma. Their cavities were filled with nematodes surrounded by cells with multinucleolate nuclei and necrotic walls. The alterations observed were similar to those induced by Anguina spp. and Nothanguina spp. on the epigeal organs of their hosts.