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United States Department of Agriculture

Agricultural Research Service

Title: Crop Sequences Influence Crop Seed Production and Plant Diseases.

Authors
item Krupinsky, Joseph
item Tanaka, Donald
item Merrill, Stephen
item Liebig, Mark
item Hendrickson, John
item Anderson, Randal
item Ries, Ronald - RETIRED, USDA-ARS-NGPRL
item Hanson, Jonathan

Submitted to: Manitoba North Dakota Zero Till Conference Proceedings
Publication Type: Proceedings
Publication Acceptance Date: December 15, 2001
Publication Date: January 29, 2002
Citation: Krupinsky, J.M., Tanaka, D.L., Merrill, S.D., Liebig, M.A., Hendrickson, J.R., Anderson, R.L., Ries, R.E., Hanson, J.D. 2002. Crop sequences influence crop seed production and plant diseases. p. 13-19. IN: Proc. of the 24th annual Manitoba North Dakota Zero Tillage Farmers Assoc. Workshop. January 29-30, Minot, North Dakota, 151 p. Conference Proceedings.

Interpretive Summary: The influence of the previous crop and crop residues needs to be more fully understood in order to develop effective cropping systems. Previous crop and crop residue influenced crop seed yields when ten crops (barley, canola, crambe, dry bean, dry pea, flax, safflower, soybean, oil seed sunflower, and wheat) were seeded in the crop residue from the same ten crops. Crop seed yields most influenced by previous crop and crop residue were flax and safflower, followed by canola, sunflower, wheat, and barley. In general seed yield was lowest when a crop was grown on its own residue. Sclerotinia (white mold) on safflower, canola and crambe varied following the different crop residues. Leaf spot diseases on wheat and barley were more severe following a wheat and barley crop, respectively, compared with the other nine crops with the early evaluations. A revised version of the Crop Sequence Calculator includes the data and provides the transfer of research technology to the producers. Crop sequences need to be considere when maximizing crop seed production and minimizing disease risk.

Technical Abstract: A crop by crop residue matrix (10 X 10) was evaluated to determine the influence of crop sequence on crop seed production and plant diseases. Previous crop (barley, canola, crambe, dry bean, dry pea, flax, safflower, soybean, oil seed sunflower, and wheat) and crop residue significantly influenced crop seed yields. The previous crop significantly influenced flax and safflower in 1999 and 2000. The previous crop residue also influenced seed yield for canola, sunflower, wheat, and barley in 2000. Thus, crop seed yields most influenced by previous crop and crop residues were flax and safflower, followed by canola, sunflower, wheat, and barley. Crop seed production least influenced by previous crop and crop residues were crambe, dry bean, and dry pea. In general seed yield was usually the lowest when the crop was grown on its own residue. Sclerotinia (Sclerotinia sclerotiorum) stem rot on canola and crambe, Sclerotinia stalk krot (wilt) and head rot (head blight) on safflower varied following the different crop residues. Leaf spot diseases on wheat and barley were more severe following a wheat and barley crop, respectively, compared with the other nine crops with the early evaluations. A revised version of the Crop Sequence Calculator includes the data and provides the transfer of research technology to the producers. Crop sequences need to be considered when maximizing crop seed production and minimizing disease risk.

Last Modified: 10/21/2014
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