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Submitted to: Journal of Nematology
Publication Type: Abstract Only Publication Acceptance Date: 11/10/2006 Publication Date: 12/20/2006 Citation: Davis, R.F. 2006. Row replacement is ineffective as a cultural control practice for Meloidogyne incognita in cotton [abstract]. Journal of Nematology. 38:270. Interpretive Summary: Technical Abstract: The objective of this study was to determine if planting cotton into the space between the previous year's rows reduces crop loss due to nematodes compared to planting in the same row every year. In 2004, nematode counts were lower in plots planted in the previous year’s rows on 4 Aug (P = 0.064) and 15 Oct (P = 0.087). Root galling was lower (P < 0.05) and yield was higher (P = 0.081) in fumigated plots, but galling and yield were not affected by row placement. On early sampling dates (24 May and 8 Jul) in 2005, nematode counts were higher (P < 0.05) in plots planted in the previous year’s rows, but counts at the end of the season (31 Oct) were higher where the row placement had been moved. Root galling was lower (P < 0.05) and yield was higher (P = 0.069) in fumigated plots, but galling and yield were not affected by row placement. Changing the placement of rows reduced nematode pressure early in the growing season in only one of the two years studied, but end-of-season root galling and lint yield were not affected in either year by changing the placement of rows, nor was the effect of fumigation on yield influenced by row placement. Therefore, row placement is unlikely to contribute to M. incognita management in cotton. |
