Next Article in Journal
Effect of Adjuvants and pH Adjuster on the Efficacy of Sulcotrione Herbicide
Previous Article in Journal
Sustainability: Obtaining Natural Dyes from Waste Matrices Using the Prickly Pear Peels of Opuntia ficus-indica (L.) Miller
Open AccessArticle

Impacts of Smooth Pigweed (Amaranthus hybridus) on Cover Crops in Southern Ontario

1
Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, St. Catharines, ON L2S 3A1, Canada
2
Department of Biology, Wilfrid Laurier University, 75 University Avenue West, Waterloo, ON N2L 3C5, Canada
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 529; https://doi.org/10.3390/agronomy10040529
Received: 19 March 2020 / Revised: 1 April 2020 / Accepted: 2 April 2020 / Published: 8 April 2020
(This article belongs to the Section Weed Science and Weed Management)
Amaranthus hybridus is a noxious weed in Ontario, with demonstrated allelopathic properties that can lead to decreased agricultural production. We tested the germination and growth of five cover crop species exposed to A. hybridus extracts, and to dried or fresh materials in soil. A germination index was calculated, and the dry weight of plant organs were measured to quantify responses to treatments. All species had reduced germination (≤29%) in 100% extract. Trifolium pratense had significant root weight reductions in extract (52%) and dried (72%) treatments, whereas shoot weight only decreased (48%) in dried treatment. Medicago sativa shoot weight decreased (52%) in 20g fresh treatment, while root weight decreased (62%) in dried treatment. Shoot weight of Raphanus sativus increased (32%) at mid-extract concentrations, while root weight increased (33%) only with dried treatment; however, both its shoot and root weight decreased (>40%) in fresh treatment. Only the shoot weight of Lolium multiflorum increased (41% in 75% extract and 55% in dried treatment). Both Cichorium intybus shoot and root weights decreased (~50%) in fresh treatment. Crop responses to A. hybridus are complex, and material and species-dependant. Further testing in the field may provide a more comprehensive understanding of how to improve the management of A. hybridus. View Full-Text
Keywords: allelopathy; cover crops; germination; plant growth; competition; facilitation; agriculture allelopathy; cover crops; germination; plant growth; competition; facilitation; agriculture
Show Figures

Figure 1

MDPI and ACS Style

VanVolkenburg, H.; Guinel, F.C.; Vasseur, L. Impacts of Smooth Pigweed (Amaranthus hybridus) on Cover Crops in Southern Ontario. Agronomy 2020, 10, 529.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop