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| DOI: | 10.1016/j.cropro.2003.12.007 |
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| Web URL(s): | http://www.sciencedirect.com/science/article/pii/S0261219403003120
Last checked: 01/31/2014
Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Gonzalez-Andujar, J. L.;
Fernandez-Quintanilla, C. |
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| Author Affiliation: | Instituto de Agricultura Sostenible, Alameda del Obispo, Córdoba, Spain, and Centro de Ciencias Medioambientales, Madrid, Spain |
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| Title: | Modelling the population dynamics of annual ryegrass (Lolium rigidum) under various weed management systems |
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| Source: | Crop Protection. Vol. 23, No. 8, August 2004, p. 723-729. |
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| Publishing Information: | Amsterdam, The Netherlands: Elsevier Science |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Lolium multiflorum; Weed control; Population dynamics; Herbicide application; Herbicide resistance; Models; Cultural control; Seeding time; Non-chemical control; Chemical control; Crop rotation
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| Abstract/Contents: | "A mathematical model for simulating the population dynamics of annual ryegrass (Lolium rigidum) has been constructed using previous reported data. The model is used to describe the bahaviour of the population in the absence of control practices and to predict the effect of various control strategies. In the absence of control and under continuous winter barley cropping the population grew sigmodally, reaching an equilibrium at a density of 2357 seeds m-2 (1508 seedlings m-2). Annual application of herbicides at 100%, 50% and 25% the standard rate resulted in reductions in the equilibrium position of the population of 90%, 80% and 70%, respectively. Using various types of cultural control tactics (delayed seeding, crop competition, seed catching, crop rotation) resulted in partial control of this weed, maintaining relatively high population levels. Keeping the prevailing crop rotation (continuous barley) and integrating the use of various chemical and cultural tactics resulted in the best long-term results with a seed bank equilibrium level of 77 seeds m-2 (49 seedlings m-2). Results from the sensitivity analysis indicate that the size of ryegrass populations is particularly vulnerable to small changes in the reproductive capacity and the loss of seeds. These two processes should be studied with greater detail in order to provide possible clues for the control of this weed. Furthermore, control tactics specifically focused on those life cycle periods should be investigated." |
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| Language: | English |
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| References: | 30 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Gonzalez-Andujar, J. L., and C. Fernandez-Quintanilla. 2004. Modelling the population dynamics of annual ryegrass (Lolium rigidum) under various weed management systems. Crop Prot. 23(8):p. 723-729. |
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| DOI: 10.1016/j.cropro.2003.12.007 |
| Web URL(s):
http://www.sciencedirect.com/science/article/pii/S0261219403003120
Last checked: 01/31/2014
Access conditions: Item is within a limited-access website |
| 
MSU catalog number: SB 950 .A1 C77 |
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