Thomas G. Chastain
Associate Department Head; Professor - Seed Crop Physiology and Ecology

My research program has been focused on addressing problems that are of economic importance to producers of Pacific Northwest crops.  While the research is often directed at solving a practical problem or developing new applications of previous research, the work also serves a secondary goal of increasing our understanding of the underlying biological processes limiting greater economic and environmental efficiency of crop production.  The disciplinary approaches that have been utilized in the research program include agronomy, physiology, and ecology.

OSU Campus
Department of Crop and Soil Science
351C Crop Science Building
Corvallis, OR 97331
United States
(541) 737-5730
CV/Resume: 

Research

Seed Production Outreach Site:

OSU Seed Production

Teaching

Courses Taught:

CROP 200 Crop Ecology and Morphology (On campus and Ecampus)

An introduction to the concepts and principles of crop ecology and morphology.  Examines the dynamics and function of crop communities, and the biotic and environmental interactions that influences productivity.  Fundamentals of the developmental morphology of crop seeds, seedlings, and plants.  Morphological features of seeds and plants in relation to the identification of crop families and species of economic importance.

CROP 460/560 Seed Production (On campus and Ecampus)

An introduction to principles and practices of seed-based genetic delivery systems.  Fundamentals of seed crop biology, cultivar maintenance, and production methods are stressed.  Concepts are illustrated using Pacific Northwest seed crops.

CROP 670 Physiology of Crop Yield (On campus only)

Concepts of crop growth and production in relation to environmental and physiological factors and their interactions; current literature.

Biography

Education:

1981 B.A. Biological Sciences, California State University, Chico, CA
1985 M.S. Crop Science, Oregon State University, Corvallis, OR
1987 Ph.D Crop Science, Oregon State University, Corvallis, OR

Professional Experience:

1989-Present Oregon State University, Professor of Crop Physiology
1987-1989 Washington State University, Assistant Professor of Seed Physiology (temporary)

Publications

Duval, A.S., T.G. Chastain, C.J. Garbacik, and D.J. Wysocki.  2017.  Nitrogen affects seed production characteristics in yellow mustard (Sinapis alba L.).  Agron. J. (In press)

Hampton, J.G., A.J. Conner, B. Boelt, T.G. Chastain, and M.P. Rolston.  2016. Climate change: Seed production and options for adaptation.  Agriculture 6(3), 33 Published online July 26, 2016; doi: 10.3390/agriculture6030033

Anderson, N.P., T.G. Chastain, and C.J. Garbacik.  2016.  Irrigation and trinexapac-ethyl effects on seed yield in first- and second-year red clover stands.  Agron. J. 108:1116-1123.

Ferguson, B.T., T.G. Chastain, C.J. Garbacik, B.T. Chastain, and D.J. Wysocki.  2016.  Spring nitrogen and cultivar affect seed production in winter canola (Brassica napus L.).  Agron. J. 108:1124-1131.

Chastain, T.G., C.M. King, W.C. Young III, C.J. Garbacik, and D.J. Wysocki.  2015.  Irrigation frequency and seasonal timing effects on perennial ryegrass (Lolium perenne) seed production.  Field Crops Research 180:126-134.

Anderson, N.P., D.P. Monks, T.G. Chastain, M.P. Rolston, C.J. Garbacik, Chun-hui Ma, and C.W. Bell.  2015.  Trinexapac-ethyl effects on red clover seed crops in diverse production environments.  Agron. J. 107:951-956.

Chastain, T.G., W.C. Young III, C.J. Garbacik, and T.B. Silberstein.  2015.  Trinexapac-ethyl rate and application timing effects on seed yield and yield components in tall fescue.  Field Crops Research 173:8-13.

Zapiola, M.L., T.G. Chastain, C.J. Garbacik, and W.C. Young III.  2014.  Trinexapac-ethyl and burning effects on seed yield components in strong creeping red fescue.  Agron J. 106:1371-1378.

Anderson, N.P., T.G. Chastain, and C.J. Garbacik.  2014.  Effect of a strobilurin containing fungicide applied at two timings on seed yield in tall fescue.  Crop Management 13: Published online April 14, 2014, doi:10.2134/CM-2013-0011-RS.

Chastain, T.G., C.J. Garbacik, and W.C. Young III.  2014.  Spring-applied nitrogen and trinexapac-ethyl effects on seed yield in perennial ryegrass and tall fescue.  Agron J. 106:628-633.

Chastain, T.G., W.C. Young III, T.B. Silberstein, and C.J. Garbacik.  2014.  Performance of trinexapac-ethyl on seed yield of Lolium perenne in diverse lodging environments.  Field Crops Research 157:65-70.

Guy, S.O., D.J. Wysocki, W.F. Schillinger, T.G. Chastain, R.S. Karow, K. Garland-Campbell, and I.C. Burke.  2014.  Camelina: adaptation and performance of genotypes.  Field Crops Research 155:224-232.

Wysocki, D.J., T.G. Chastain, W.F. Schillinger, S.O. Guy, and R.S. Karow.  2013.  Camelina: seed yield response to applied nitrogen and sulfur.  Field Crops Research 145:60-66.

Huettig, K.D., T.G. Chastain, C. J. Garbacik, W.C. Young III, and D.J. Wysocki.  2013.  Spring irrigation of tall fescue for seed production.  Field Crops Research  144:297-304.

Hampton, J.G., B. Boelt, M.P. Rolston, and T.G. Chastain.  2013.  Effects of elevated temperature and CO2 on seed quality.  J. Agric. Sci. (Cambridge) 151:154-162.  doi: 10.1017/S0021859612000263, Published online by Cambridge University Press 30 March 2012.

Chastain, T.G.  2012.  Crop Ecology:  Productivity and Management in Agricultural Systems Second EditionBy David J. Connor, Robert S. Loomis, and Kenneth G. Cassman.   Cambridge University Press. The Quarterly Review of Biology 87:(4)379.

Schillinger, W.F., D.J. Wysocki, T.G. Chastain, S.O. Guy, and R.S. Karow.  2012. Camelina: planting date and method effects on stand establishment and seed yield.  Field Crops Research 130:138-144.

Chastain, T.G., C.J. Garbacik, T.B. Silberstein, and W.C. Young III.  2011.  Seed production characteristics of three fine fescue species in residue management systems.  Agron. J. 103:1495-1502.

Mueller-Warrant, G.W., W.C. Young III, T.G. Chastain, and S.C. Rosato.  2007.  Residue management and herbicides for downy brome (Bromus tectorum) control in Kentucky bluegrass grown for seed.  Weed Tech.  21:411-421.

Zapiola, M. L., T. G. Chastain, C. J. Garbacik, T. B. Silberstein, and W. C. Young III. 2006. Trinexapac-ethyl and open-field burning maximize seed yield in creeping red fescue. Agron. J. 98:1427-1434.

Meints, P. D., Chastain, T.G., W.C. Young III, G.M. Banowetz, and C. J. Garbacik. 2001.  Stubble management effects on three creeping red fescue cultivars grown for seed production.  Agron. J. 93:1276-1281.

Chastain, T.G., W.C. Young III, C.J. Garbacik, P.D. Meints, and T.B. Silberstein.  2000.  Alternative residue management and stand age effects on seed quality in cool-season perennial grasses.  Seed Technology 22: 34-42.

Young, W.C. III, T.B. Silberstein, T.G. Chastain, and J.S. Rowarth.  1998.  The relationship between applied nitrogen, nitrogen concentration in herbage, and seed yield in perennial ryegrass (Lolium perenne L.).  II.  Cultivars in Oregon.  J. Appl. Seed Prod. 16:115-124.

Chastain, T.G., and W.C. Young III.  1998.  Vegetative plant development and seed production in cool-season perennial grasses.  Seed Science Research 8:295-301.

Griffith, S.M., and T.G. Chastain.  1997.  Physiology and growth of ryegrass.  In F.M. Rouquette, Jr. and L.R. Nelson (ed.) Ecology, Production, and Management of Lolium for Forage in the USA, CSSA Spec. Publ. 24:15-28.

Chastain, T.G., G.L. Kiemnec, C.J. Garbacik, B.M. Quebbeman, G.H. Cook, and F.J. Crowe.  1997.  Residue management strategies for Kentucky bluegrass seed production.  Crop Sci.  37:1836-1840.

Silberstein, T.B., T.G. Chastain, and W.C. Young III.  1996. Growth and yield of red clover seed crops treated with paclobutrazol and uniconazol. J. Appl. Seed Prod.14:17-23.

Ball, D.A., D.J. Wysocki, and T.G. Chastain.  1996.  Nitrogen application timing effects on downy brome (Bromus tectorum) and winter wheat (Triticum aestivum) growth and yield.  Weed Tech. 10:305-310.

Chastain, T.G., K.J. Ward, and D.J. Wysocki.  1995.  Seedbed residue and seed size relationships in winter barley.  Agron. J.  87:517-520.

Chastain, T.G., K.J. Ward, and D.J. Wysocki.  1995.  Stand establishment responses of soft white winter wheat to seedbed residue and seed size.  Crop Sci.  35:213-218.

Chastain, T.G., B.L. Klepper, and D.E. Wilkins.  1994.  Relationship of wheat seed sprouting severity, planting depth, and seed treatment to emergence and yield.  Crop Sci. 34:508-513.

Smiley, R.W., W. Uddin, P.K. Zwer, D.J. Wysocki, D.A. Ball, T.G. Chastain, and P.E. Rasmussen.  1993.  Influence of crop management practices on physiologic leaf spot of winter wheat.  Plant Dis.  77:803-810.

Chastain, T.G.  1992.  Relationship of ergot to Kentucky bluegrass seed production and quality.  J. Appl. Seed Prod. 10:7-10.

Chastain, T.G.  1991.  High temperature sodium hypochlorite effects on viability of Tilletia controversa teliospores and wheat seed.  Crop Sci.  31:1327-1330.

Chastain, T.G., and B. King.  1990.  A biochemical method for estimating viability of teliospores of Tilletia controversa.  Phytopathology  80:474-476.

Chastain, T.G., and D.F. Grabe.  1989.  Spring establishment of turf-type tall fescue seed crops with cereal companion crops.  Agron. J.  81:488-493.

Chastain, T.G., and D.F. Grabe.  1989.  Spring establishment of orchardgrass seed crops with cereal companion crops.  Crop Sci.  29:466-471.

Chastain, T.G., and D.F. Grabe.  1988.  Establishment of red fescue seed crops with cereal companion crops.  II.  Seed production and economic implications.  Crop Sci.  28:313-316.

Chastain, T.G., and D.F. Grabe.  1988.  Establishment of red fescue seed crops with cereal companion crops.  I.  Morphological responses.  Crop Sci. 28:308-312.

Selected Extension Publications:

Anderson, N.P., T.G. Chastain, J.M Hart., W.C. Young III, and N.W. Christensen. 2014. Tall fescue grown for seed: a nutrient management guide for western Oregon. Nutrient Management Guide. Oregon State University, EM 9099.

Schillinger, W.F., D.J. Wysocki, T.G. Chastain, S.O. Guy, and R.S. Karow.  2014.  Camelina: effects of planting date and method on stand establishment and seed yield.  Pacific Northwest Extension Publication, PNW 661.

Hart, J.M., N.P. Anderson, T.G. Chastain, M.D. Flowers, C.M. Ocamb, M.E. Mellbye, and W.C. Young III.  2013.  Perennial ryegrass grown for seed.  Nutrient Management Guide.  Oregon State University, EM 9086.

Hart, J.M., N.P. Anderson, A.G. Hulting, T.G. Chastain, M.E. Mellbye, W.C. Young III, and T.B. Silberstein.  2012.  Postharvest residue management for grass seed production in Western Oregon.  Oregon State University, EM 9051.

Silberstein, T.B., M.E. Mellbye, T.G. Chastain, and W.C. Young III.  2010.  Using seed moisture as a harvest management tool.  Oregon State University, EM 9012.