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Growth Regulator Effects of Propiconazole on Redroot Pigweed (Amaranthus retroflexus)

Published online by Cambridge University Press:  20 January 2017

Bradley D. Hanson
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83844-2339
Carol A. Mallory-Smith*
Affiliation:
Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331-3002
Bill D. Brewster
Affiliation:
Department of Crop and Soil Science, Oregon State University, Corvallis, OR 97331-3002
Laura A. Wendling
Affiliation:
Department of Crop and Soil Sciences, Washington State University, Pullman, WA 99164-6420
Donald C. Thill
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83844-2339
*
Corresponding author's E-mail: carol.mallory-smith@oregonstate.edu

Abstract

Nonfungicidal effects of agricultural fungicides on crop plants have been reported previously; however, there are few reports of nontarget effects of fungicides on weedy species. Field research trials in Oregon demonstrated that the growth of several broadleaf weeds was reduced after multiple applications of the fungicide propiconazole. Greenhouse experiments confirmed that preemergence applications of propiconazole reduced the biomass accumulation of several common broadleaf and grass weeds 15 to 63%. Laboratory experiments were performed on redroot pigweed, the most sensitive species, to examine the effects of propiconazole on germination and early seedling growth. Redroot pigweed germination and total seedling length (root plus shoot) were reduced at propiconazole concentrations above 37 and 0.36 mg/L, respectively. Growth-regulating effects of fungicides such as propiconazole on the germination and early growth of weeds may contribute to integrated weed management, especially when adequate moisture ensures the presence of germinating seeds and small seedlings throughout the growing season.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

Anderson, R. L. and Nelson, L. A. 1975. A family of models involving intersecting straight lines and concomitant experimental designs useful in evaluating response to fertilizer nutrients. Biometrics 31:303318.Google Scholar
Benton, J. M. and Cobb, A. H. 1993. The plant growth regulator activity of the fungicide BAS 480F. Pestic. Sci 39:357369.Google Scholar
Benton, J. M. and Cobb, A. H. 1995. The plant growth regulator activity of the fungicide, epoxiconazole, on Galium aparine L. (cleavers). Plant Growth Regul 17:149155.CrossRefGoogle Scholar
Biggs, A. R. 1990. Reduction in transpiration and return bloom in apple by two sterol-inhibiting fungicides. HortScience 25:14031405.Google Scholar
Buchenauer, H. 1987. Mechanism of action of triazolyl fungicides and related compounds. in Lyr, H., ed. Modern Selective Fungicides—Properties, Applications, Mechanisms of Action. New York: J. Wiley. Pp. 205231.Google Scholar
Buchenauer, H. and Röhner, E. 1981. Effect of triadimefon and triadimenol on growth of various plant species as well as on gibberellin content and sterol metabolism in shoots of barley seedlings. Pestic. Biochem. Physiol. 15:5870.Google Scholar
Burden, R. S., Clark, T., and Holloway, P. J. 1987. Effects of sterol biosynthesis-inhibiting fungicides and plant growth regulators on the sterol composition of barley plants. Pestic. Biochem. Physiol. 27:289300.Google Scholar
Crozier, A., Kamiya, Y., Bishop, G., and Yokota, T. 2000. Biosynthesis of hormones and elicitor molecules. in Buchanan, B. B., Gruissem, W., and Jones, R. L., eds. Biochemistry and Molecular Biology of Plants. Rockville, MD: American Society of Plant Physiology. Pp. 850926.Google Scholar
Dey, P. M. and Harborne, J. B. 1997. Plant Biochemistry. San Diego, CA: Academic. 554 p.Google Scholar
Goatley, J. M. Jr. and Schmidt, R. E. 1990. Seedling Kentucky bluegrass growth responses to chelated iron and biostimulator materials. Agron J. 82:901905.Google Scholar
Hanson, L. A., Brewster, B. D., Mallory-Smith, C. A., and Hanson, B. D. 2000. Effects of propiconazole on germination and growth of broadleaf weeds. 2000 Proc. West. Soc. Weed Sci. 3132.Google Scholar
He, Y. and Wetzstein, H. Y. 1994. Pollen degeneration and retarded leaf development from fungicidal sprays applied during microspore development and shoot expansion. J. Hortic. Sci 69:975983.Google Scholar
Hewitt, H. G. 1998. Fungicides in Crop Protection. New York: CAB International. 221 p.Google Scholar
Kane, R. T. and Smiley, R. W. 1983. Plant growth-regulating effects of systemic fungicides applied to Kentucky bluegrass. Agron. J. 75:469473.Google Scholar
Khalil, I. A. and Mercer, E. I. 1990. Effect of some sterol-biosynthesis-inhibiting fungicides on the biosynthesis of polyisoprenoid compounds in winter wheat seedlings. Phytochemistry 29:417424.Google Scholar
Köller, W. 1987. Isomers of sterol synthesis inhibitors: fungicidal effects and plant growth regulator activities. Pestic. Sci 18:129147.CrossRefGoogle Scholar
Pscheidt, J. W. 1997. Pacific Northwest 1997 Plant Disease Control Handbook. Oregon State University Publication. 391 p.Google Scholar
Reicher, Z. J. and Throssell, C. S. 1997. Effect of repeated fungicide applications on creeping bentgrass turf. Crop Sci 37:910915.Google Scholar
[SAS] Statistical Analysis Systems. 1999–2001. SAS User's Guide. Version 8.2. Cary, NC: Statistical Analysis Systems Institute. 1686 p.Google Scholar
Scheinpflug, H. and Kuck, K. H. 1987. Sterol biosynthesis inhibiting piperazine, pyridine, pyrimidine, and azole fungicides. in Lyr, H., ed. Modern Selective Fungicides—Properties, Applications, Mechanisms of Action. New York: J. Wiley. Pp. 173204.Google Scholar
Schwinn, F. J. 1983. Ergosterol biosynthesis inhibitors. An overview of their history and contribution to medicine and agriculture. Pestic. Sci 15:4047.Google Scholar
Taton, M., Ullmann, P., Benveniste, P., and Rahier, A. 1988. Interaction of triazole fungicides and plant growth regulators with microsomal cytochrome P-450 dependent obtusifoliol 14α-methyl demethylase. Pestic. Biochem. Physiol. 30:178189.Google Scholar
Vyas, S. C. 1988. Nontarget Effects of Agricultural Fungicides. Boca Raton, FL: CRC. 258 p.Google Scholar
Watt, T. A. 1983. The fungicide tridemorph as a selective herbicide for the control of Holcus lanatus in ryegrass and of Bromus sterilis in barley. Weed Res. 23:267271.Google Scholar