Loading content, please wait..
loading..
Logo
Version 3.24
or
Publication Type J
Authors Burke, I. C., W. E. Thomas, J. F. Spears and J. W. Wilcut
Title Influence of environmental factors on after-ripened crowfootgrass (Dactyloctenium aegyptium) seed germination
Source Weed Science
Author Keywords alternating temperature pH scarification water stress weed biology giant foxtail temperature emergence dormancy nigeria weeds
Abstract Laboratory and greenhouse studies were conducted to determine the effect of temperature, pH, water stress, and planting depth on crowfootgrass germination. When treated with constant temperature, crowfootgrass germinated over a range of 15 to 40 C, with the optimum germination occurring at 30 C (42%). Onset, rate, and total germination (94%) were greatest in an alternating 20 and 35 C temperature regime. Germination decreased as pH increased, with greatest germination occurring at pH 4 and 5. Germination was reduced when seed was Subjected to water stress, and no germination occurred below -0.8 mPa. Emergence was similar when seed were placed on the soil surface or buried at depths of 0.5 or I cm. Germination decreased with burial depth, and no seed emerged from 10 cm. These data suggest that crowfootgrass may emerge later in the season with warmer temperatures and after a precipitation event, and may emerge rapidly. These attributes could contribute to poor control later in the season by soil-applied herbicides or allow crowfootgrass to emerge after final postemergence treatments are made.
Author Address N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695 USA. Burke, IC, N Carolina State Univ, Dept Crop Sci, Box 7620, Raleigh, NC 27695 USA.
Publication Date May-Jun
Year Published 2003
Volume 51
Issue 3
Beginning Page 342-347
Unique Article Identifier ISI:000183094600010
Plants associated with this reference

LEGAL NOTICES — This website is protected by Copyright © The University of Sussex, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022. The eHALOPH database is protected by Database Right and Copyright © The University of Sussex and other contributors, 2006, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022. This database is based on an earlier work by James Aronson.
THIS WEBSITE AND THIS DATABASE ARE PROVIDED ON AN "AS IS" BASIS, AND YOU USE THEM AND RELY ON THEM AT YOUR OWN RISK.

Contact email: halophytes@sussex.ac.uk
Credits – Tim Flowers, Joaquim Santos, Moritz Jahns, Brian Warburton, Peter Reed