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Effects of Soil Temperature, Seed Depth, and Cyanazine on Giant Foxtail (Setaria faberi) and Velvetleaf (Abutilon theophrasti) Seedling Development

  • Thomas C. Mester (a1) and Douglas D. Buhler (a2)


Controlled-environment experiments were conducted to determine the effects of soil temperatures of 5 to 20 C, seed depths of 0 to 6 cm, and above- or below-seed cyanazine placement on germination and seedling development of giant foxtail and velvetleaf. Giant foxtail did not germinate at 5 C and failed to emerge from 6 cm deep within 21 days at 10 C. Increasing soil temperature above 10 C increased giant foxtail germination and emergence. Velvetleaf germinated at 5 C but did not emerge within 21 days. Velvetleaf emerged within 21 days from soil depths of 2 to 6 cm at soil temperatures of 10, 15, and 20 C. Giant foxtail and velvetleaf seed germinated on a soil surface kept moist by mulch or frequent watering. Giant foxtail seedling survival was 100% after germination on the soil surface. Velvetleaf often failed to become established; only 28% of the velvetleaf that germinated at 20 C survived. Injury to giant foxtail by cyanazine increased with increasing soil temperatures and decreasing seed depths. Cyanazine placement above or below the seed did not have a consistent effect on giant foxtail injury. Cyanazine placed above the seed was more injurious to velvetleaf than placement below at 15 and 20 C. Differential responses of giant foxtail and velvetleaf seed germination and seedling survivability to initial seed depth appears to be a major factor in weed population shifts when tillage is reduced or eliminated.



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1. Buhler, D. D. and Daniel, T. C. 1988. Influence of tillage systems on giant foxtail (Setaria faberi) and velvetleaf (Abutilon theophrasti) density and control in corn (Zea mays). Weed Sci. 36:642647.
2. Buhler, D. D. and Oplinger, E. S. 1990. Influence of tillage systems on annual weed densities and control in solid-seeded soybean (Glycine max). Weed Sci. 38:158165.
3. Dawson, J. H. 1963. Development of barnyardgrass seedlings and their response to EPTC. Weeds 11:6067.
4. Dowling, P. M., Clements, R. J., and McWilliam, J. R. 1971. Establishment and survival of pasture species from seeds sown on the soil surface. Aust. J. Agric. Res. 22:6174.
5. Fay, P. K. and Olson, W. A. 1978. Technique for separating weed seed from soil. Weed Sci. 26:530533.
6. Harper, J. L. 1977. Population Biology of Plants. Academic Press, New York. Pages 84120.
7. Horowitz, M. and Taylorson, R. B. 1984. Hardseededness and germinability of velvetleaf (Abutilon theophrasti) as affected by temperature and moisture. Weed Sci. 32:111115.
8. Johnson, M. D. and Lowery, B. 1985. Effect of three conservation tillage practices on soil temperature and thermal properties. Soil Sci. Soc. Am. J. 49:15471552.
9. King, L. J. 1947. Germination and chemical control of the giant foxtail grass. Contrib. Boyce Thompson Inst. Plant Res. 15:469487.
10. Mester, T. C. and Buhler, D. D. 1990. Effect of planting depth on velvetleaf (Abutilon theophrasti) seedling development and response to cyanazine. Weed Sci. 38:3438.
11. Penner, D. 1971. Effect of temperature on phytotoxicity and root uptake of several herbicides. Weed Sci. 19:571576.
12. Sheldon, J. C. 1974. The behavior of seeds in soil. III. The influence of seed morphology and the behavior of seedlings on the establishment of plants from surface-lying seeds. J. Ecol. 62:4765.
13. Triplett, G. B. Jr. and Lytle, G. D. 1972. Control and ecology of weeds in continuous corn grown without tillage. Weed Sci. 20:453457.
14. Walker, A. 1973. Vertical distribution of herbicides in soil and their availability to plants: Treatment of different proportions of the total root system. Weed Res. 13:416421.
15. Wiese, A. M. and Binning, L. K. 1987. Calculating the threshold temperature of development for weeds. Weed Sci. 35:177179.
16. Wrucke, M. A. and Arnold, W. E. 1985. Weed species distribution as influenced by tillage and herbicides. Weed Sci. 33:853856.
17. Yenish, J. P. 1990. Effects of tillage on vertical distribution and viability of weed seed in soil. M.S. Thesis, Univ. Wisconsin, Madison, WI. 89.


Effects of Soil Temperature, Seed Depth, and Cyanazine on Giant Foxtail (Setaria faberi) and Velvetleaf (Abutilon theophrasti) Seedling Development

  • Thomas C. Mester (a1) and Douglas D. Buhler (a2)


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