Warwick, S.I. and Black, L.D. (1983) The biology of canadian weeds. 61. sorghum halepense (L.) pers. Canadian Journal of Plant Science, 63 (4). pp. 997-1014.
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Abstract
A review of biological information is provided for S. halepense. A native of S. Eurasia to India, S. halepense occurs as a weed in most tropical and temperate areas of the world and has recently become established in 10 counties in S. Ontario. Listed as one of the world's worst weeds, S. halepense infestations result in severe crop losses either from competition or allelopathic effects and/or by serving as an alternative host for several crop pests. The spp. is, however, an important forage crop in the SE United States and other areas of the world. Its production of extensively creeping rhizomes and large numbers of seeds, rhizomes which regenerate easily if cut into small pieces in cultivation procedures, self-compatibility, seed longevity, seed dormancy and vigorous growth under a wide range of environmental conditions are described. A population of S. halepense from Brant County, Ontario is known to produce rhizomes which successfully overwinter in Canada. This population appears to be distinct from the other Ontario populations and is characterized by smaller seeds and seedlings and lower rates of germination. A combination of repeated tillage, proper herbicides and crop rotation will give the best control of S. halepense.ADDITIONAL ABSTRACT:Among the aspects included in this review are: growth and development, reproduction, hybrids (tabulated data are given on chromosome number and hybrid fertility of hybrids between S. halepense and several grain sorghums), population dynamics and response to chemicals, agronomic practices and pests and diseases. One population differs from others in Ontario, in having rhizomes which overwinter.ADDITIONAL ABSTRACT:Johnson grass (Sorghum halepense), a weed that occurs in most tropical and temperate areas of the world, has recently become established in 10 counties of southern Ontario. This review of its biology includes information on insects that feed on it in various parts of the world, including several pests of sorghum and maize, for which Johnson grass serves as an alternative food-plant
| Item Type: | Article |
|---|---|
| Author Affiliation: | Biosystematics Research Institute, Agric. Canada, Ottawa, Ont. K1A 0C6, Canada. |
| Subjects: | Plant Protection |
| Divisions: | Sorghum |
| Depositing User: | Mr B Krishnamurthy |
| Date Deposited: | 09 May 2012 14:25 |
| Last Modified: | 09 May 2012 14:25 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/5186 |
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