Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control

Climatic conditions for seed germination of four weed species, Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor, which occur commonly in cereal fields in the north of Saudi Arabia, were compared. Proportionately, most seeds of the two collected seed lots germinated during the fi...

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Main Author: Khalid S. Alshallash
Format: Article
Language:English
Published: Elsevier 2018-06-01
Series:Annals of Agricultural Sciences
Online Access:http://www.sciencedirect.com/science/article/pii/S0570178318300137
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spelling doaj-124be57c54cf49359992fe7488ae0adf2020-11-24T23:35:31ZengElsevierAnnals of Agricultural Sciences0570-17832018-06-016319197Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and controlKhalid S. Alshallash0Address: College of Sciences, Shaqra University, Saudi Arabia.; College of Sciences, Shaqra University, Saudi Arabia; Academic Visitor, School of Biological Sciences, University of Reading, UKClimatic conditions for seed germination of four weed species, Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor, which occur commonly in cereal fields in the north of Saudi Arabia, were compared. Proportionately, most seeds of the two collected seed lots germinated during the first three weeks of the experiment, confirming an early response pattern. Overall, germination was higher in Bromus catharticus, Avena fatua and Phalaris minor than Chenopodium album. Compared to the other species, proportionately more Phalaris minor seeds germinated in the second period, indicating a higher propensity for slow germination. Germination in all species favoured alternating temperatures (10/20 °C or 5/25 °C) over a constant (15 °C), in a light/dark (16/8 h) regime. However, Avena fatua and Bromus catharticus seeds also showed significant germination in a dark only (24 h) regime, indicating light has less influence on their germination. Variation in germination between geographically separate seed collections of all four species was significant in some conditions, however, the general pattern was of similar responses between the two seed lots. Results determined that, in respect of interactions between temperature and light, the most important climatic condition for maximum seed germination, in all four weed species, is alternating temperatures. The outcomes of this study can lead to the expected timings of weed species' germination and dispersal in field conditions, and are used to make recommendations for practical weed control measures. Keywords: Avena fatua, Bromus catharticus, Chenopodium album, Phalaris minor, Climatic conditions, Weeds, Seed germination, Saudi Arabiahttp://www.sciencedirect.com/science/article/pii/S0570178318300137
collection DOAJ
language English
format Article
sources DOAJ
author Khalid S. Alshallash
spellingShingle Khalid S. Alshallash
Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
Annals of Agricultural Sciences
author_facet Khalid S. Alshallash
author_sort Khalid S. Alshallash
title Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
title_short Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
title_full Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
title_fullStr Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
title_full_unstemmed Germination of weed species (Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor) with implications for their dispersal and control
title_sort germination of weed species (avena fatua, bromus catharticus, chenopodium album and phalaris minor) with implications for their dispersal and control
publisher Elsevier
series Annals of Agricultural Sciences
issn 0570-1783
publishDate 2018-06-01
description Climatic conditions for seed germination of four weed species, Avena fatua, Bromus catharticus, Chenopodium album and Phalaris minor, which occur commonly in cereal fields in the north of Saudi Arabia, were compared. Proportionately, most seeds of the two collected seed lots germinated during the first three weeks of the experiment, confirming an early response pattern. Overall, germination was higher in Bromus catharticus, Avena fatua and Phalaris minor than Chenopodium album. Compared to the other species, proportionately more Phalaris minor seeds germinated in the second period, indicating a higher propensity for slow germination. Germination in all species favoured alternating temperatures (10/20 °C or 5/25 °C) over a constant (15 °C), in a light/dark (16/8 h) regime. However, Avena fatua and Bromus catharticus seeds also showed significant germination in a dark only (24 h) regime, indicating light has less influence on their germination. Variation in germination between geographically separate seed collections of all four species was significant in some conditions, however, the general pattern was of similar responses between the two seed lots. Results determined that, in respect of interactions between temperature and light, the most important climatic condition for maximum seed germination, in all four weed species, is alternating temperatures. The outcomes of this study can lead to the expected timings of weed species' germination and dispersal in field conditions, and are used to make recommendations for practical weed control measures. Keywords: Avena fatua, Bromus catharticus, Chenopodium album, Phalaris minor, Climatic conditions, Weeds, Seed germination, Saudi Arabia
url http://www.sciencedirect.com/science/article/pii/S0570178318300137
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