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Germination and Emergence of Hairy Beggarticks (Bidens pilosa)
Published online by Cambridge University Press: 12 June 2017
Abstract
Effects of environmental factors on germination and emergence of hairy beggarticks were examined in laboratory and greenhouse studies. Optimum temperature range for germination of hairy beggarticks was 25/20 to 35/30 C (day/night, 12/12 h). Germination decreased above or below this range. Temperatures below 15/10 C and above 45/40 C were unfavorable for germination. Hairy beggarticks seed can germinate under both a 12-h photoperiod and a 24-h dark regime. Seed germinated 78 to 90% in buffer solutions of pH 4 to 9. Radicle growth was more sensitive to extreme pH than germination. Osmotic stress up to −0.1 MPa had little effect on germination, but less than 3% of the seed germinated at an osmotic stress of −0.75 MPa. Hairy beggarticks seed (13%) germinated at NaCl concentration of 100 mM but failed to germinate at 200 mM NaCl. Maximum emergence occurred when seed were planted less than 1 cm deep. No seedlings emerged when planted 10 cm deep. Flooding even for a day following planting decreased emergence to 25% compared to no flooding (56%). Seedling emergence decreased sharply with a further increase in duration of flooding, and no seedlings emerged when flooding was maintained up to 28 d after planting.
Keywords
- Type
- Weed Biology and Ecology
- Information
- Copyright
- Copyright © 1992 by the Weed Science Society of America
References
Literature Cited
1.
Baird, J. H. and Dickens, R.
1991. Germination and emergence of Virginia buttonweed (Diodia virginiana). Weed Sci.
39:37–41.CrossRefGoogle Scholar
2.
Balyan, R. S. and Bhan, V. M.
1986. Germination of horse purslane (Trianthema portulacastrum) in relation to temperature, storage conditions, and seeding depths. Weed Sci.
34:513–515.Google Scholar
3.
Biswas, P. K., Bell, P. D., Crayton, J. L., and Paul, K. B.
1975. Germination behavior of Florida pusley seeds. I. Effects of storage, light, temperature and planting depths on germination. Weed Sci.
23:400–403.Google Scholar
4.
Eberlein, C. V.
1987. Germination of Sorghum almum seeds and longevity in soil. Weed Sci.
35:796–801.Google Scholar
5.
Egley, G. H. and Duke, S. O.
1985. Physiology of weed seed dormancy and germination. Pages 27–64
in
Duke, S. O., ed. Weed Physiology. Vol. I. Reproduction and Ecophysiology. CRC Press, Inc., Boca Raton, FL.Google Scholar
6.
Evetts, L. L. and Burnside, O. C.
1972. Germination and seedling development of common milkweed and other species. Weed Sci.
20:371–378.CrossRefGoogle Scholar
7.
Holm, L. G., Plucknett, D. L., Pancho, J. V., and Herberger, J. P.
1977. The World's Worst Weeds. Distribution and Biology. Univ. Press of Hawaii, Honolulu. 609 pp.Google Scholar
8.
Jain, R. and Singh, M.
1989. Factors affecting goatweed (Scoparia dulcis) seed germination. Weed Sci.
37:766–770.Google Scholar
9.
Shaw, D. R., Mack, R. E., and Smith, C. A.
1991. Redvine (Brunnichia ovata) germination and emergence. Weed Sci.
39:33–36.Google Scholar
10.
Shaw, D. R., Smith, H. R., Cole, A. W., and Snipes, C. E.
1987. Influence of environmental factors on smallflower morningglory (Jacquemontia tamnifolia) germination and growth. Weed Sci.
35:519–523.Google Scholar
11.
Singh, M. and Achhireddy, N. R.
1984. Germination ecology of milkweedvine (Morrenia odorata). Weed Sci.
32:781–785.Google Scholar
12.
Soteres, J. K. and Murray, D. S.
1981. Germination and development of honeyvine milkweed (Ampelamus albidus) seed. Weed Sci.
29:625–628.Google Scholar
13.
Steuter, A. A., Mozafar, A., and Goodin, J. R.
1981. Water potential of aqueous polyethylene glycol. Plant Physiol.
67:64–67.Google Scholar
14.
Taylorson, R. B.
1987. Environmental and chemical manipulation of weed seed dormancy. Rev. Weed Sci.
3:135–154.Google Scholar
15.
Wilson, R. G. Jr.
1979. Germination and seedling development of Canada thistle (Cirsium arvense). Weed Sci.
27:146–151.Google Scholar