Selected Pacific Northwest Crops as Hosts of Pratylenchus neglectus and P. thornei

Abstract

Smiley, R. W., Yan, G. P., and Gourlie, J. A. 2014. Selected Pacific Northwest crops as hosts of Pratylenchus neglectus and P. thornei. Plant Dis. 98:1341-1348.Thirty crop species and cultivars were assayed in the greenhouse for efficiency as hosts of Pratylenchus neglectus and P. thornei. Hosting ability ratings were assigned using the ratio of final versus initial nematode density and also by comparing the final nematode density to that of a susceptible wheat control. Good hosts of both Pratylenchus spp. included oat 'Monida', chickpea 'Myles', and lentil 'Athena' and 'Morton'. Good hosts of P. neglectus but not of P. thornei included 10 Brassica spp. (5 canola, 2 mustard, and 3 camelina cultivars), chickpea

Effects of Co-inoculation with Pratylenchus thornei and Fusarium culmorum on Growth and Yield of Winter Wheat

“…Tabie 3. Percent reduetion of plant growth and grain yield parameters, averaged over two seasons, when rainfed winter wheat was grown in pots ineubated under field conditions and inoeulated with Pratylenchus thornei at initial densities of 0, 1, 2, or 4 juveniles/g of soil (PtO, Ptl, Pt2, and Pt4), Eusarium culmorum (Fe) eolonized millet seed at a rate of 0.65 g/kg of soil, or eo-inoeulations with P. thornei et al (41) repotted that visual symptoms did not always provide an accurate assessment of crown rot damage during years where plant stress was minimal. It is likely that our finding that inoculation of plants with F. culmorum during a year without significant drought stress led to reductions of plant growth and yield without the appearance of typical symptoms of crown rot.…”

Rhizosphere plant-microbe interactions under water stress

“…In addition, parasitic nematodes such as root-lesion nematodes (Pratylenchus spp.) (Smiley, Yan, & Gourlie, 2014) are now recognized as yield-limiting factors in dryland cropping systems. Among these diseases, take-all is most severe on wheat in irrigated dryland fields and in areas with higher precipitation (>450 mm annually).…”

Links between soilborne pathogens, plant parasitic nematodes, farm management and biophysical constraints in a southern Australian rainfed cropping system

“…This contradicts previous management guidelines, that R. solani (AG-8) has such a wide host range that it cannot be controlled using rotations (MacLeod et al 2008), and adds to a growing body of evidence suggesting canola is a poor host of R. solani AG-8 (Gupta et al 2010;Babiker et al 2013;Hüberli et al 2013;Flower et al 2019). Interestingly P. neglectus DNA increased within canola crops and this carried through to following wheat crops, but only a small proportion of canola plants (2%) showed P. neglectus symptoms, which indicates canola is a tolerant host, as previously reported (Smiley et al 2014;Flower et al 2019) and visual assessment of symptoms is not a good indicator of susceptibility.…”