Influence of previous crops and nematicide treatments on root lesion nematode populations and crop yields

Published source details Kimpinski J., Edwards L.M., Gallant C.E., Johnson H.W., MacLeod J.A. & Sanderson J.B. (1992) Influence of previous crops and nematicide treatments on root lesion nematode populations and crop yields. Phytoprotection, 73, 3-11.
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This study is summarised as evidence for the following.

	Action	Category
	Use crop rotation in potato farming systems Action Link

Use crop rotation in potato farming systems

A randomised, replicated study in 1983-1987 on Prince Edward Island, Canada (Kimpinski et al. 1992) found more root lesion nematodes Pratylenchus penetrans (pest) in barley Hordeum vulgare after one year of soybean Glycine max (3,240 nematodes/g root and 4,170 nematodes/kg soil) than after potato Solanum tuberosum, wheat Triticum aestivum, or two years of continuous barley (630-780 nematodes/g root and 1,260-1,700 nematodes/kg soil). Barley yields were highest after potato (3,514 kg/ha), followed by soybean (3,293 kg/ha), wheat (3,195 kg/ha) and continuous barley (2,712 kg/ha). In soybean after barley, nematode density and yield did not change according to crops two years before. In the final study year, nematode density did not vary between plots, but potato yield was lower in plots that had grown potato or soybean three years before. Crops were grown in randomised 10 x 32 m plots, in a field planted with barley the previous year. Each rotation pattern was replicated six times. Plots grew barley, wheat, soybean or potato in 1984, barley or potato in 1985, soybean in 1986 and potato in 1987. Seeding rates, fertilizer, pesticide and herbicide use followed standard practice for the region.