|Reinertsen, Stephen - MCGREGOR COMPANY|
Submitted to: Fungicide and Nematocide Tests
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: June 30, 2004
Publication Date: October 1, 2004
Citation: Paulitz, T.C., Reinertsen, S. 2004. Controlling rhizoctonia root rot in spring barley with in-furrow application of quadris plus seed treatment with dynasty and dividend extreme, 2003. Fungicide and Nematocide Tests. 59:CF011. Interpretive Summary: Application of the fungicide Quadris or nitrogen in the seed furrow significantly increased the yield of spring barley under high Rhizoctonia root rot pressure.
Technical Abstract: Treatment with Nitropak alone or Quadris alone (4 fl oz/A) significantly increased barley yields. A T-test comparison of the control and Dynasty (0.16 fl oz/A) treatment was significant at P=0.086. When the Quadris-only treatments were analyzed separately, the effect of Quadris was significant at P= 0.036, with increasing rates increasing yield. However, there was a significant negative interaction between Quadris and Nitropak (P=0.046). The 2003 growing season was extremely dry, with only 1.4 in of precipitation between 1 May 03 and 1 Aug 03. Treatments with Quadris in combination with Nitropak produced lush vegetative growth that may have run out of water before seed set, thus reducing yield.