Effect of 3-year rotation sequences and pearl millet on population densities ofPratylenchuspenetransand subsequent potato yield

Abstract

Various crops were evaluated in 3-year rotation sequences for their ability to reduce population densities of the potato root-lesion nematode, Pratylenchus penetrans, and improve subsequent potato (Solanum tuberosum) yield in field microplots. Forage and grain pearl millets (Pennisetum glaucum) were evaluated against oats (Avena sativa), Indian mustard (Brassica juncea), soybean (Glycine max), rye (Secale cereale), potato, and corn (Zea mays). Population densities of P. penetrans were high under rye, potato, oats, and Indian mustard and low under both forage and grain pearl millets. A single year of grain pearl millet after two consecutive years of potato or rye significantly reduced P. penetrans populations compared with 3 years of potato or rye and two consecutive years of corn, Indian mustard, oats, or soybean. One year of forage or grain pearl millet prior to potato decreased P. penetrans populations below the damage threshold of 1000 kg -1 of soil. The subsequent potato crop produced the highest marketable and total yields following either three consecutive crops of forage or grain pearl millet or a single crop of forage or grain pearl millet preceded by rye or soybean. Total yields of potato 'Superior' were significantly negatively correlated with soil densities of P. penetrans in both fall 2002 (P < 0.001, r = -0.539) and spring 2003 (P < 0.001, r = -0.423). Both forage pearl millet 'CFPM 101' and the grain pearl millet hybrid 'CGPM H-1' have potential for the magagement of P. penetrans in Quebec's potato-production system.

Fluensulfone and 1,3-dichloroprene for plant-parasitic nematode management in potato production

“…Lesion nematode control was better with 1,3-D than fluensulfone, but was inconsistent from year to year with both products. Lesion nematode is an important pathogen in the northern USA as it is associated with potato early dying complex in conjunction with the soil fungus Verticillium (Belair et al, 2006;LaMondia, 2006;MacGuidwin et al, 2012), but this complex is not known to be present in the Southeast. The impact of lesion nematode on potato yield in the Southeast is relatively unknown, but it has not been tied to yield suppression in this study or previous studies (Crow et al, 2000).…”

Sugar Yield of Sweet Pearl Millet and Sweet Sorghum as Influenced by Harvest Dates and Delays Between Biomass Chopping and Pressing

“…Sweet pearl millet is highly drought tolerant, performs well on poor and acidic soils [4,5], and has the ability to reduce populations of root-lesion nematodes [Pratylenchus penetrans (Cobb) Filipjev & Schuur. Stekh] when grown in rotation with susceptible crops [6][7][8]. Sweet sorghum is well adapted to various climates and marginal soil types [9,10].…”

Yield and Composition of Sweet Pearl Millet as Affected by Row Spacing and Seeding Rate

“…Pearl millet is highly drought tolerant, performs well on poor and acidic soils (Andrews and Kumar, 1992; AERC, 2008) and has the ability to reduce populations of root‐lesion nematode [ Pratylenchus penetrans (Cobb) Filipjev & Schuur. Stekh] when grown in rotation with susceptible crops (Ball‐Coelho et al, 2003; Bélair et al, 2004, 2005, 2006). In addition, pearl millet produces high biomass with DM yields of up to 27 t ha −1 , depending on geographical location, cultivar, and soil and climatic conditions (Gray et al, 2000).…”