Influence of Time on Population Development and Pathogenicity of Tylenchorhynchus agri on Trifolium pratense, Poa pratensis and Triticum aestivum

Abstract

In a greenhouse study conducted from December 1974 to December 1975, Tylenchorhynchus agri Ferris populations reached maximum levels in May on winter wheat (Triticum aestivum L.), and in July on bluegrass (Poa pratensis L.) and red clover (Trifolium pratense L.). Dry weights of individual and of cumulative clippings of shoots and dry root weights of infected bluegrass were significantly lighter than those of uninfected plants in May, October and July, respectively Clover weights showed similar trends. Dense nematode populations at planting reduced the growth of a second planting of wheat.