Effect of crop rotation with grain pearl millet on Pratylenchus penetrans and subsequent potato yields in Quebec

Abstract

A field study was conducted in Quebec to determine the effect of crop rotation with grain pearl millet (Pennisetum glaucum) on Pratylenchus penetrans populations and the subsequent yields of two potato cultivars (Solanum tuberosum) when compared with rye and continuous potato with and without fumigation. Pearl millet had a suppressive effect on P. penetrans populations compared with rye but not as much as continuous potato with fumigation. In 2002, total potato yields of cv. Superior and cv. Hilite Russet were negatively correlated with P. penetrans densities at harvest. Total yields of potato cv. Superior were increased by 123 and 229% following pearl millet and fumigation, respectively, compared with rye. Total yields of potato cv. Hilite Russet increased by 26 and 17% following pearl millet and fumigation. Grain pearl millet CGPM H-1 reduced P. penetrans densities and improved potato yields in Quebec.L’effet d’une rotation avec le millet perlé grain (Pennisetum glaucum) sur les populations de Pratylenchus penetrans et les rendements subséquents de deux variétés de pommes de terre (Solanum tuberosum) a été comparé à des rotations avec le seigle, la pomme de terre et la pomme de terre suivie d’une fumigation. Le millet a eu un effet suppressif sur les populations de P. penetrans comparativement au seigle, mais à un degré moindre que la fumigation. En 2002, les rendements de pommes de terre cv. Superior et cv. Hilite Russet étaient négativement corrélés avec les densités à la récolte du P. penetrans. Les rendements de pomme de terre cv. Superior ont été accrus respectivement de 123 et de 229 % après la culture de millet et la fumigation comparativement au seigle. Les rendements de pomme de terre cv. Hilite Russet ont été accrus respectivement de 26 et de 17 % après la culture de millet perlé et la fumigation. Le millet perlé grain CGPM H-1 a réduit les densités du P. penetrans et accru les rendements de pommes de terre au Québec

Production of methyl sulfide and dimethyl disulfide from soil-incorporated plant materials and implications for controlling soilborne pathogens

“…For example, strawberry production in California and Italy has traditionally relied on fumigation with methyl bromide and chloropicrin for controlling a wide array of soilborne fungal pathogens (Wilhelm and Paulus 1980;Lazzeri et al 2003;Subbarao et al 2007). Potato growers are increasing their reliance on soil fumigation with chemicals such as metam sodium to control Verticillium and nematode populations in Idaho (Davis et al 2004), other US states (Collins et al 2006;Larkin and Griffin 2007;Snapp et al 2007), Canada (Dauphinais et al 2005) and Israel (Gamliel et al 1997). In perennial nursery and orchard/vineyard crops, fumigation with 1,3-dichloropropene and chloropicrin is used for controlling soilborne plant pathogens and plant parasitic nematodes during replanting (Westphal et al 2002;Mazzola and Mullinix 2005;Browne et al 2006;Schneider et al 2006).…”