Nematode Survey of Peanuts and Cotton in Southwest Georgia

Abstract

A random survey of 467 peanut and cotton fields in 17 counties of Southwest Georgia was conducted to determine the frequency of occurrence and distribution of parasitic nematodes associated with peanuts and cotton. Meloidogyne species were present in 9.7% of the peanut field soil samples, Pratylenchus spp. (primarily brachyurus) in 16.9% and Criconemoides ornatus in 97%. Sixty-nine percent of the rootknot associated with peanuts was M. hapla, 25% was M. arenaria and 6% was a mixture of both. Sting nematodes, Belonolaimus spp., were not found in peanut fields in the survey. In cotton soils, 11.8% of the samples contained Meloidogyne spp., 5.1% Hoplolai. mus columbus, and 0.7% Rotylenchulus reniformis.

Rapid change in host specificity in a field population of the biological control organism Pasteuria penetrans

“…the most economically important plant parasitic nematodes today. The focus of this study is Meloidogyne arenaria , the peanut root nematode, a polyploid asexual species responsible for significant crop damage in the southeastern United States (Blanc‐Mathieu et al, ; Ingram & Rodriguez‐Kabana, ; Motsinger, Crawford, & Thompson, ; Starr & Morgan, ; Wheeler & Starr, ).…”

Resistance to Tomato spotted wilt virus and Root‐Knot Nematode in Peanut Interspecific Breeding Lines

“…The peanut root‐knot nematode is also an important pathogen in many peanut production areas of the world. In the USA, this nematode is a significant pathogen in peanut fields in Georgia (Motsinger et al, 1976), Texas (Wheeler and Starr, 1987), Alabama (Ingram and Rodriguez‐Kabana, 1980), and North Carolina (Schmitt and Barker, 1988). The development of resistant cultivars will reduce yield losses and pesticide inputs.…”