WSU Tree Fruit Research & Extension Center

Organic & Integrated Tree Fruit Production

Wednesday, October 17, 2018

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Search results on 10/17/18

1440. Cook, R.J.(ed.). 1969. Nature of the inluence of crop residues on fungus-induced root diseases.. Western Regional Research Publ. W-38, WA Agr. Expt. Sta. Bull 716.
Includes crops throughout the western states, including irrigated land and horticultural crops. Discusses techniques for studying pathogens in the soil environment, persistance, growth, nutrient interaction, role of antibiosis, and residue effects.

5735. Rasmussen, P.E. and C.R. Rohde. 1988. Stubble burning effects on winter wheat yield and N utilization under semiarid conditions.. Agronomy J. 80:940-942.
Burning vs. not burning was examined at 3 nitrogen levels over 6 years (3 crops). Burning had no effect on grain yield or grain N uptake. Burning increased straw yield when wheat was fertilized by N, but had no effect on straw N uptake. Burning did not decrease foot rot incidence or severity, but did reduce downy brome density. T: Effects of stubble burning and N fertilization on grain and straw of winter wheat 1980-85. Effect of stubble burning on foot rot infection. Effect of stubble burning on downybrome infestation.

10931. Cook, R.J., J.W. Sitton, and W.A. Haglund. 1987. Influence of soil treatments on growth and yield of wheat and implications for control of Pythium root rot.. Phytopathology 77:1192-1198.
Thirty-three of 39 wheat fields sampled in eastern Washington from 1983-1986 had high levels of Pythium spp. Soil fumigation eliminated 95-99% of the inoculum and resulted in adult wheat plants that were 3-10 cm taller than those grown in nontreated soil. Solarization and straw burning eliminated 80-90 and 40-50% of the Pythium inoculum respectively and resulted in taller plants. Wheat yields were 13-36% greater in response to fumigation in fields where wheat was grown every other year, 3-12% greater where wheat was grown every third year and 19 and 14% greater respectively in response to solarization and burning.

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.

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