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Sicklepod (Senna obtusifolia) Control in Soybean (Glycine max) with Imazaquin and Metribuzin Combinations

  • Robert E. Etheridge (a1), Edward C. Murdock (a1), Gregory S. Stapleton (a1) and Joe E. Toler (a2)

Abstract

Field studies were conducted in 1993 and 1994 to evaluate sicklepod control with combinations of imazaquin + metribuzin at lower than normal use rates. Soybean was seeded in late-May to early-June each year and imazaquin and metribuzin were applied PPI alone at 0.75 and 1x and 0.5, 0.75, and 1x their registered rates, respectively, and in factorial combinations of their 0.5 and 0.75x rates. The registered (1x) rates for imazaquin and metribuzin on this soil type are 0.14 and 0.43 kg/ha, respectively. Several standard sequential treatments and flumetsulam + trifluralin PPI at 0.06 + 0.70 and 0.07 + 0.95 kg/ha were included for comparison. Sicklepod control and soybean seed yield responses differed between 1993 and 1994. In 1993, the combinations of imazaquin + metribuzin averaged 90% control 6 wk after planting (WAP) and soybean seed yield increased 75% compared to the untreated check. Imazaquin + metribuzin at their respective 0.5x rate was as effective as any treatment evaluated. In 1994, sicklepod control was generally lower with all treatments. Soybean seed yield was reduced due to sicklepod interference with soil-applied treatments alone. However, imazaquin + metribuzin at their respective 0.75x rate provided sicklepod control levels and reductions in weed biomass similar to those observed with flumetsulam + trifluralin at 0.07 + 0.95 kg/ha and the sequential treatments, and increased soybean seed yield 19% compared to the untreated check.

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1. Aldrich, R. J. 1984. Resumption of growth. p. 19157 in Weed-Crop Ecology. Principles of Weed Management. Bartlett, J. P. and Pitcher, J. H., eds., Breton Publishers, North Scituate, MA.
2. Anonymous. 1995. Broadstrike + Treflan® Product Label, p. 589593 in Crop Protection Reference. Chemical and Pharmaceutical Press, Inc., New York, NY.
3. Anonymous. 1995. Canopy® Product Label. p. 781786 in Crop Protection Reference. Chemical and Pharmaceutical Press, Inc., New York, NY.
4. Anonymous. 1995. Scepter® 70 DG Product Label. p. 192198 in Crop Protection Reference. Chemical and Pharmaceutical Press, Inc., New York, NY.
5. Anonymous. 1995. Sencor® DF Product Label. p. 12821306 in Crop Protection Reference. Chemical and Pharmaceutical Press, Inc., New York, NY.
6. Bridges, D. C. and Walker, R. H. 1985. Influence of weed management and cropping systems on sicklepod (Cassia obtusifolia) seed in the soil. Weed Sci. 33:800804.
7. Buchanan, G. A. and Burns, E. R. 1971. Weed competition in cotton I. Sicklepod and tall morningglory. Weed Sci. 19:576579.
8. Burnside, O. C. and Moomaw, R. S. 1977. Control of weeds in narrow-row soybeans. Agron. J. 69:793796.
9. Coble, H. D. and Schrader, J. W. 1973. Soybean tolerance to metribuzin. Weed Sci. 21:308309.
10. Creel, J. M. Jr., Hoveland, C. S., and Buchanan, G. A. 1968. Germination, growth, and ecology of sicklepod. Weed Sci. 16:396400.
11. Crowley, R. H., Teem, D. H., Buchanan, G. A., and Hoveland, C. S. 1979. Responses of Ipomoea spp. and Cassia spp. to preemergence applied herbicides. Weed Sci. 27:531535.
12. Dowler, C. C. 1992. Weed survey-Southern states. Proc. South. Weed Sci. Soc. 45:392407.
13. Etheridge, R. E., Murdock, E. C., Stapleton, G. S., and Gossett, B. J. 1994. Sicklepod (Cassia obtusifolia) control in soybean with Treflan + Broadstrike. Proc. South. Weed Sci. Soc. 47:65.
14. Fedtke, C. 1979. Physiological responses of soybean (Glycine max) plants to metribuzin. Weed Sci. 27:192195.
15. Fedtke, C. 1991. Deamination of metribuzin in tolerant and susceptible soybean (Glycine max) cultivars. Pestic. Sci. 31:175183.
16. Hackett, N. 1990. Imazaquin behavior in the soil. American Cyanamid Co., Princeton, NJ. 23 p.
17. Hardcastle, W. S. 1974. Differences in the tolerance of metribuzin by varieties of soybeans. Weed Res. 14:181184.
18. Helms, R. S., Tripp, T. N., Smith, R. J. Jr., Baldwin, F. L., and Hackworth, M. 1989. Rice (Oryza sativa) response to imazaquin residues in a soybean (Glycine max) and rice rotation. Weed Technol. 3:513517.
19. Hsu, J. C. 1984. Constrained simultaneous confidence intervals for comparisons with the best. Ann. Stat. 12:11361144.
20. Isaacs, M. A., Murdock, E. C., Toler, J. E., and Wallace, S. U., 1989. Effect of late-season herbicide applications on sicklepod (Cassia obtusifolia) seed production and viability. Weed Sci. 37:761765.
21. Loux, M. M., Liebl, R. A., and Slife, F. W. 1989. Availability and persistence of imazaquin, imazethapyr, and clomazone in soil. Weed Sci. 37:259267.
22. Miller, D. K. and Griffin, J. L. 1994 Comparison of herbicide programs and cultivation for sicklepod (Cassia obtusifolia) control in soybean. Weed Technol. 8:7782.
23. Mills, J. A. and Witt, W. W. 1989. Efficacy, phytotoxicity, and persistence of imazaquin, imazethapyr, and clomazone in no-till double-crop soybeans (Glycine max). Weed Sci. 37:353359.
24. Murdock, E. C. 1983. Systems for control of Florida beggarweed in soybeans. Proc. South. Weed Sci. Soc. 36:421.
25. Murphy, T. R., Gossett, B. J., and Toler, J. E. 1986. Dormancy and field burial of cowpea (Vigna unguiculata) seed. Weed Sci. 34:260265.
26. Newson, L. J. and Shaw, D. R. 1994. Influence of cultivation timing on weed control in soybean (Glycine max) with AC 263,222. Weed Technol. 8:760765.
27. Peters, E. J., Gebhardt, M. R., and Stritzke, J. F. 1965. Interrelations of row spacing, cultivations, and herbicides for weed control in soybeans. Weeds 13:285289.
28. Renner, K. A., Meggitt, W. F., and Leavitt, R. A. 1988. Influence of rate, method of application, and tillage on imazaquin persistence in soil. Weed Sci. 36:9095.
29. Risley, M. A. and Oliver, L. R. 1991. Efficacy of imazaquin on various weed species. Weed Sci. 39:243250.
30. Shaw, D. R., Newson, L. J., and Smith, C. A. 1991. Influence of cultivation timing on chemical control of sicklepod (Cassia obtusifolia) in soybean (Glycine max). Weed Sci. 39:6772.
31. Sherman, M. E., Thompson, L. Jr., and Wilkinson, R. E. 1983. Sicklepod (Cassia obtusifolia) management in soybean (Glycine max). Weed Sci. 31:622627.
32. Shurtleff, J. L. and Coble, H. D. 1985. Interference of certain broadleaf weed species in soybeans (Glycine max). Weed Sci. 33:654657.
33. Sims, B. D. and Oliver, L. R. 1990. Mutual influences of seedling johnsongrass (Sorghum halepense), sicklepod (Cassia obtusifolia), and soybean (Glycine max). Weed Sci. 38:139147.
34. Teem, D. S., Hoveland, C. S., and Buchanan, G. A. 1980. Sicklepod (Cassia obtusifolia) and coffee senna (Cassia occidentalis): Geographic distribution, germination, and emergence. Weed Sci. 28:6871.
35. Thurlow, D. L. and Buchanan, G. A. 1972. Competition of sicklepod with soybeans. Weed Sci. 20:379384.
36. Walker, R. H., Patterson, M. G., Hauser, E., Isenhour, D. J., Todd, J. W., and Buchanan, G. A. 1984. Effects of insecticide, weed-free period, and row spacing on soybean (Glycine max) and sicklepod (Cassia obtusifolia) growth. Weed Sci. 32:702706.
37. Wax, L. M., Stoller, E. W., and Bernard, R. L. 1976. Differential response of soybean cultivars to metribuzin. Agron. J. 68:484486.
38. Yelverton, F. H. and Coble, H. D. 1991. Narrow row spacing and canopy formation reduces weed resurgence in soybeans (Glycine max). Weed Technol. 5:169174.

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