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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Morales-Payan, J. P.;
Santos, B. M.;
Bewick, T. A. |
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| Author Affiliation: | Horticultural Sciences Department, University of Florida, Gainesville, FL 32611 |
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| Title: | Inter- and intraspecific interference of yellow and purple nutsedge |
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| Section: | Papers and Abstracts Presented
Other records with the "Papers and Abstracts Presented" Section
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| Meeting Info.: | 49th Annual Meeting, Charlotte, NC, January 15-17, 1996 |
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| Source: | Southern Weed Science Society Proceedings. Vol. 49, 1996, p. 158-159. |
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| Publishing Information: | Champaign, IL: Southern Weed Science Society. |
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| # of Pages: | 2 |
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| Abstract/Contents: | "Purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus L.) are among the worst weeds in the world. Purple nutsedge is predominant in tropical areas, where yellow nutsedge is more abundant in subtropical and temperate climates. In Florida, both species are commonly found. In agricultural areas, one of the two species occurs in higher population densities. Selective suppression by herbicides might partially explain this occurrence. Competition between both species is a possible mechanism in herbicide-free situations. There are no reports on interspecific interference between purple and yellow nutsedge. Replacement series experiments were conducted under greenhouse conditions at the University of Florida in order to determine the effects of intra- and interspecific interference of purple and yellow nutsedge. Presprouted tubers from Gainesville, FL, were planted simultaneously and in an uniform distribution in plastic containers measuring 40 x 60 x 15 cm and filled with a commercial potting medium. Water and mineral nutrients were supplied in non-limiting amounts. Treatments were arranged in a randomized complete block design with four replications. Three population densities (50, 150 and 300 plants mā»Ā²) and five proportions of the two weed species (4:0, 3:1, 2:2, 1:3, 0:4; PN:YN) were established. Plants were harvested 45 days after planting. Plant height, shoot number and weight, and tuber number and weight were measured. Analysis of variance was performed on the resulting data. Relative Yield (RY) and Relative Yield Total (RYT) were calculated for both species at the densities and proportions under study. Neither population density nor species proportion had significant effects on the plant height of either nutsedge species. There was a significant effect of species proportion on tuber weight and number and on shoot weight and number. The pattern of the proportion effect was similar at the three densities and for all said variables. As the proportion of one species decreased and that of the second species increased, so did the magnitude of the variables measured for each species. However, the extent of change detected in the variables was not proportional to the change of stand composition. Results indicated that purple nutsedge was more competitive than yellow nutsedge. Values for RYT suggest no allelopathic effect of one species on the other." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Morales-Payan, J. P., B. M. Santos, and T. A. Bewick. 1996. Inter- and intraspecific interference of yellow and purple nutsedge. South. Weed Sci. Soc. Proc. 49:p. 158-159. |
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MSU catalog number: SB 611 .S6 |
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