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Effects of Insecticide, Weed-Free Period, and Row Spacing on Soybean (Glycine max) and Sicklepod (Cassia obtusifolia) Growth

  • Robert H. Walker (a1), Michael G. Patterson (a1), Ellis Hauser (a2), David J. Isenhour (a2), James W. Todd (a2) and Gale A. Buchanan (a3)...

Abstract

Results from identical experiments conducted at Headland, AL, and Plains, GA, from 1980 through 1982 show insecticide treatment had little effect on soybean [Glycine max (L.) Merr. ‘Coker 237′] growth and morphology. Maximum insecticide applications increased soybean seed weight in two of five trials. Soybeans maintained free of sicklepod (Cassia obtusifolia L. ♯3 CASOB) for 4 weeks after emergence produced yields equal to those receiving season-long control in all trials, and 2-week control was equal to season-long maintenance in three trials. Length of weed interference-free maintenance did not affect soybean height. The number of pods per plant and seed weight were decreased when there was no control. Sicklepod shoot fresh weight and numbers decreased as the weed-free period increased from 0 weeks through the season. Row spacing had no effect on soybean height or seed size; however, the number of pods per plant was higher in 80- than in 40-cm rows. Row spacing influenced yield in only one trial where 20-cm rows outyielded 40-cm rows. A significant interaction occurred between the weed-free period and row spacing in two trials. Soybeans in 20-cm rows outyielded those in 40- and 80-cm rows when sicklepod was not controlled (i.e., 0 weeks interference-free maintenance).

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References

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1. Anonymous. 1971. Soybean production-recent research findings. Ala. Agric. Exp. Stn. Bull. 413. 75 pp.
2. Barrentine, W. L. 1974. Common cocklebur competition in soybeans. Weed Sci. 22:600603.
3. Buchanan, G. A., Walker, R. H., and Jolley, E. R. 1980. Metolachlor: New herbicide for peanuts. Highlights of Agricultural Research, 27, No. 2. Agric. Exp. Stn., Auburn Univ., AL.
4. Burnside, O. C. 1979. Soybean (Glycine max) growth as affected by weed removal, cultivar, and row spacing. Weed Sci. 27:562565.
5. Creel, J. M. Jr., Hoveland, C. S., and Buchanan, G. A. 1968. Germination, growth, and ecology of sicklepod. Weeds 16:396400.
6. Parker, M. B., Marchant, W. H., and Mullinix, B. J. Jr. 1981. Date of planting and row spacing effects on four soybean cultivars. Agron. J. 73:759762.
7. Probst, A. H. 1945. Influence of spacing on yield and other characters in soybeans. Agron. J. 37:549555.
8. Shehane, R. H. and Bass, M. H. 1974. Growth and yield of soybeans following treatment with phorate, carbofuran, methomyl, or disulfoton. Environ. Entomol. 3:574575.
9. Teem, D. H., Hoveland, C. S., and Buchanan, G. A. 1980. Sicklepod (Cassia obtusifolia) and coffee senna (Cassia occidentalis): Geographic distribution, germination, and emergence. Weed Sci. 18:6871.
10. Thurlow, D. L. and Buchanan, Gale A. 1972. Competition of sicklepod with soybeans. Weed Sci. 20:379384.
11. Wax, L. M., Nave, W. R., and Cooper, R. L. 1977. Weed control in narrow and wide-row soybeans. Weed Sci. 25:7378.
12. Wax, L. M. and Pendleton, J. W. 1968. Effect of row spacing on weed control in soybeans. Weed Sci. 16:462465.
13. Weber, C. R., Shibles, R. M., and Byth, D. E. 1966. Effect of plant population and row spacing on soybean development and production. Agron. J. 58:99102.
14. Weber, C. R. and Staniforth, D. W. 1957. Competitive relationships in variable weed and soybean stands. Agron. J. 49:440444.
15. Wheeler, B. A. and Bass, M. H. 1971. Effects of certain systemic insecticides on growth and yield of soybeans. J. Econ. Entomol. 64:12191221.
16. Wiggans, R. G. 1939. The influence of space and arrangement on the production of soybean plants. Agron. J. 31:314321.

Keywords

Effects of Insecticide, Weed-Free Period, and Row Spacing on Soybean (Glycine max) and Sicklepod (Cassia obtusifolia) Growth

  • Robert H. Walker (a1), Michael G. Patterson (a1), Ellis Hauser (a2), David J. Isenhour (a2), James W. Todd (a2) and Gale A. Buchanan (a3)...

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