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Effects of Three Weed Residues on Weed and Crop Growth

  • W. Carroll Johnson (a1) and Harold D. Coble (a1)

Abstract

Broadleaf signalgrass [Brachiaria platyphylla (Griseb.) Nash # BRAPP has recently become the dominant annual grass in certain fields of the North Carolina Coastal Plains. Previously, fall panicum (Panicum dichotomiflorum Michx. # PANDI) and large crabgrass [Digitaria sanguinalis (L.) Scop. # DIGSA] were the dominant annual grasses in the region. One of the possible reasons for the observed population shift could be production of inhibitors or stimulators by one species that affects the population dynamics of the other species. Studies were initiated to evaluate the effects of broadleaf signalgrass, large crabgrass, and fall panicum residue, applied as a mulch or soil incorporated, on five indicator species: the three weeds themselves, corn (Zea mays L.), and soybean [Glycine max (L.) Merr.]. At expected residue levels, the degree of inhibition or stimulation from fall panicum and broadleaf signalgrass was determined to be significant for some indicator species. When such responses were seen, the amount of residue necessary to produce these results was usually within the concentrations normally observed in field situations. Based on these results, it appears that the observed population shift is partially mediated by the production of inhibitors or stimulators through plant residue. Other factors such as differential herbicide selectivity and crop rotation are being investigated.

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1. Abdul-Wahab, A. S. and Rice, E. L. 1967. Plant inhibition by johnsongrass and its possible significance in old field succession. Bull. Torrey Bot. Club 94:486497.
2. Bell, T. B. and Koepee, D. E. 1972. Noncompetitive effects of giant foxtail on the growth of corn. Agron. J. 64:321325.
3. Bhowmik, P. C. and Doll, J. D. 1983. Growth analysis of corn and soybean response to allelopathic effects of weed residues at various temperatures and photosynthetic photon flux densities. J. Chem. Ecol. 9:12631280.
4. Bonner, J. 1950. The role of toxic substances in the interactions of higher plants. Bot. Rev. 16:5165.
5. Borner, H. 1960. Liberation of organic substances from higher plants and their role in the soil sickness problem. Bot. Rev. 26: 393424.
6. Chamblee, R. W., Thompson, L. Jr., and Bunn, T. M. 1982. Management of broadleaf signalgrass (Brachiaria platyphylla) in peanuts (Arachis hypogaea) with herbicides. Weed Sci. 30: 4044.
7. Chamblee, R. W., Thompson, L. Jr., and Coble, H. D. 1982. Interference of broadleaf signalgrass (Brachiaria platyphylla) in peanuts (Arachis hypogaea). Weed Sci. 30:4549.
8. Drost, D. C. and Doll, J. D. 1980. The allelopathic effect of yellow nutsedge (Cyperus esculentus) on corn (Zea mays) and soybeans (Glycine max). Weed Sci. 28:229233.
9. Friedman, T. and Horowitz, M. 1971. Biologically active substances in subterranean parts of purple nutsedge. Weed Sci. 19: 398401.
10. Kommendahl, T., Kotheimer, J. B., and Bernardini, J. V. 1959. The effects of quackgrass on germination and seedling development of certain crop plants. Weeds 7:12.
11. LeTourneau, D. and Heggeness, H. G. 1957. Germination and growth inhibitors in leafy spurge foliage and quackgrass rhizomes. Weeds 5:1219.
12. Lolas, P. C. and Coble, H. D. 1982. Noncompetitive effects of johnsongrass (Sorghum halepense) on soybeans (Glycine max). Weed Sci. 30:589593.
13. Muller, C. H. 1966. The role of chemical inhibition (allelopathy) in vegetational composition. Bull. Torrey Bot. Club 93:332351.
14. Muller, C. H. 1969. Allelopathy as a factor in ecological process. Vegetatio. 18:348357.
15. Ohman, J. H. and Kommendahl, T. 1960. Relative toxicity of extracts from vegetative organs of quackgrass to alfalfa. Weeds 8:666670.
16. Parenti, R. L. and Rice, E. L. 1969. Inhibitional effects of Digitaria sanguinalis and possible role in old field succession. Bull. Torrey Bot. Club. 96:7078.
17. Thompson, L. Jr., Lewis, W. M., and Chamblee, R. W. 1981. Identification and management of broadleaf signalgrass. North Carolina Agric. Ext. Serv. AG-251.
18. Tukey, H. B. Jr. 1969. Implications of allelopathy in agricultural plant science. Bot. Rev. 35.116.

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Effects of Three Weed Residues on Weed and Crop Growth

  • W. Carroll Johnson (a1) and Harold D. Coble (a1)

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