Potential effects of diurnally alternating temperatures and solarization on purple nutsedge (Cyperus rotundus) tuber sprouting

Purple nutsedge (Cyperus rotundus L.) is one of the most serious weed problems of the arid environments. The distribution of its tubers in a naturally infested field in Greece indicated that the highest proportion is located in the upper 200mm of the soil. Furthermore, the effects of temperature alt...

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Bibliographic Details
Published in:Journal of arid environments 2009-01, Vol.73 (1), p.22-25
Main Authors: Travlos, I.S., Economou, G., Kotoulas, V.E., Kanatas, P.J., Kontogeorgos, A.N., Karamanos, A.I.
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
arid lands
Biological and medical sciences
Cyperus rotundus
Fundamental and applied biological sciences. Psychology
Greece
Soil depth
soil solarization
soil temperature
Solarization
Synecology
Terrestrial ecosystems
Tuber
tuber sprouting
Weed management
weeds
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Summary:Purple nutsedge (Cyperus rotundus L.) is one of the most serious weed problems of the arid environments. The distribution of its tubers in a naturally infested field in Greece indicated that the highest proportion is located in the upper 200mm of the soil. Furthermore, the effects of temperature alternation on the rate and percentage of tuber sprouting were evaluated by means of laboratory studies. It was found that the total tuber sprouting and rate were significantly increased after a shift of daily temperature fluctuation from 0 to 12°C. Sprouting rate and percentage were significantly and consistently higher for the tubers originating from the upper 5cm of the soil, compared with the tubers obtained from the layer of 50–150mm for all the temperature treatments. Additionally, solarization seems potentially effective on purple nutsedge tuber sprouting, as long as it resulted not only to a soil temperature shift, but also to a high diurnal temperature variation. Moreover, the uniform sprouting of about 95% of the tubers in the soil may allow a more complete control by mechanical, biological or chemical methods.
ISSN:0140-1963
1095-922X
DOI:10.1016/j.jaridenv.2008.09.006