Browse on keywords: disease WA foot rot
Search results on 10/20/18
1431. Cook, R.J.. 1974. Control of Fusarium footrot of wheat in the Northwest USA.. Australian Plant Path. Soc. Newsletter 3(2).
8307. Murray, T., C.C. Walter, and L. Pritchett. 1990. Strawbreaker foot rot and Cephalosporium stripe. p. 88-90.. IN: 1990 Field Day Research Report. Dept. of Agronomy & Soils, Washington State Univ., Pullman, WA.
Strawbreaker footrot (eyespot) is one of the most important and chronic diseases of winter wheat in eastern WA. Cephalosporium stripe is another important disease that can be devasting, but epidemics are more sporadic than footrot. Both diseases are important in wheat seeded early on summer fallow, especially in areas with more than 16" precipitation, and where crop rotations are short. Soil pH appears to be a factor in both diseases, with less severity at higher pH. Strains of footrot resistant to the fungicides Benlate, Mertec, and Topsin have been identified. Two new wheat varieties resistant to footrot have been released - Hyak and Madsen. Using a disease index of 0 (good) to 400 (bad) for footrot, Madsen rated 119, while Stephens rated 306. Stephens treated with fungicide rated 140. The economic threshold is 175-225. Overfertilized plants are more susceptible to footrot. There is a reduction in disease when going to no-till, which may only be a seeding date effect.
11057. Cook, R.J.. 1980. Fusarium foot rot of wheat and its control in the Pacific Northwest.. Plant Disease 64:1061-1066.
Fusarium foot rot occurs mainly in low to intermediate rainfall areas of the PNW (20-40 cm) where wheat is grown after fallow. The disease appears related to water stress. Sometimes nitrogen use can induce water stress and was blamed for the disease. Wheat varieties vary in their susceptibility to the disease. The disease can be controlled by minimizing pathogen population increases and by reducing or delaying water stress. Oats should be avoided since they are an excellent host for the disease. Actions to improve water infiltration and storage reduce the chance of water stress. By maintaining residue on the surface, airborne saprophytic fungi will colonize it and prevent Fusarium from doing so. N applications should be based on realistic yields so water stress will not be induced. September seeding, rather than August, avoids excessive foliar growth which can induce water stress.
11067. Cook, R.J. and J.T. Waldher. 1977. Influence of stubble-mulch residue management on Cercosporella foot rot and yields of winter wheat.. Plant Disease Reporter 61:96-100.
The stubble-mulch method of residue management at Pullman, WA, did not favor more Cercosporella foot rot than the moldboard plow method. Foot rot was generally less severe on wheat in stubble-mulched plots, apparently because of poorer wheat growth already in early fall. This poorer wheat growth in certain years was not corrected by benomyl application. In general, Cercosporella severity was directly proportional to plant size and vigor in the fall, regardless of tillage method.