Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: December 29, 2004
Publication Date: January 18, 2005
Citation: Krupinsky, J.M., Tanaka, D.L., Liebig, M.A., Merrill, S.D., Hanson, J.D., Gulya Jr, T.J. 2005. Using crop sequence and biological control to minimize sclerotinia on canola, chickpea, dry pea, lentils, and sunflower, 2004. p. 44. IN: Proc. of 2005 Sclerotinia Initiative Annual Meeting, Bloomington, MN, January 18-20, 2005. Technical Abstract: A multi-disciplinary team of scientists is conducting a Crop Sequence Project, which includes a crop by crop residue matrix to evaluate the impact of previous crops (buckwheat, chickpea, corn, lentils, proso millet, grain sorghum, canola, dry pea, sunflower, and wheat) and crop residue on Sclerotinia diseases of chickpea, canola, dry pea, lentil, or sunflower. With the exception of Sclerotinia basal stalk rot on sunflower, Sclerotinia diseases were not detected because of the dry conditions during the growing season. Sclerotinia basal stalk rot was present on sunflower and increased during the three evaluations but because of the low number of sunflower plants infected, the incidence of disease could not be statistically related to the crops grown in 2003. The use of Coniothyrium minitans (Intercept WG®) in reducing the risk to Sclerotinia disease was evaluated in a Biological Control Project at site one. Treatments after the uniform application of sclerotia included: the growing of susceptible and resistant crops, and varying the timing of Intercept WG® applications. Influence of crop sequences and biological control on development of Sclerotinia was evaluated twice with sunflower, an indicator crop. Because of dry conditions, low numbers of sunflower plants were infected with Sclerotinia basal stalk rot making it difficult to statistically relate disease levels to treatments. Soil coverage by crop residue indicated that higher values were associated with small grain species. Minor differences were detected among plots with soil water measurements and analyses of soil properties indicating that the site was relatively uniform.