The distribution of plant-parasitic nematodes in five Texas peanut producing counties was determined during 1985 and 1986 growing seasons. Criconemella, the most frequently detected genus, was present in 83.4 of the samples; evidence of crop damage was not observed. Meloidogyne arenaria was detected in 15.5 of the samples. In microplot tests, there was a significant negative relationship between initial populations of M. arenaria and peanut yields; a linear model estimates a 10 yield loss with initial populations of 4483 M. arenaria500 cm3 soil. At least 10 of the survey samples were estimated to have root-knot nematode populations exceeding that necessary for a 10 yield loss. Other parasitic genera found in the survey were Pratylenchus (15.7 of the samples) and Belonolaimus (0.8 of the samples). While pod symptoms of Pratylenchus damage were observed, reliable yield loss estimates can not be made with existing data.
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Keywords: yield losses, lesion nematodes, Pratylenchus spp, ring nematodes, Criconemella spp, sting nematodes, Belonolaimus spp, root-knot nematodes, and Meloidogyne spp
How to Cite:
Wheeler, T. & Starr, J., (1987) “Incidence and Economic Importance of Plant-Parasitic Nematodes on Peanut in Texas”, Peanut Science 14(2), p.94-96. doi: https://doi.org/10.3146/i0095-3679-14-2-11