Abstract

The goal of this paper was to determine the allelopathic potential of Gleichenella pectinata on three weed species (Echinochloa crus-galli (L.) Beauv (Poaceae), Ipomoea grandifolia (Dammer) O'Donell (Convolvulaceae) and Euphorbia heterophylla L. (Euphorbiaceae)). The experimental design was entirely randomized, with six replicates. The target plant responses were analyzed individually (percentage and average time of germination of the seeds and initial growth of seedlings) or combined, using the Global Effect Index. The extracts had a low effect on the percentage and average time of seed germination, but inhibited the seedling growth. The combined analysis revealed that almost all treatments caused inhibition. This analysis also showed the differences between the two phenological stages.

Highlights

  • Weed plants represent one of the main problems of global agriculture

  • The current principal way of controlling weed plants relies on synthetic herbicides (Hong et al 2004), and in Brazil the cost of using these products was in excess of 4,6 billion in 2008 (SINDAG 2008)

  • The growth in weed resistance to herbicides is occurring as a global phenomenon, which is characterized by the decrease of response of populations to chemical products at recommended dosages (Gelmini, et al 2001)

Read more

Summary

Introduction

Weed plants represent one of the main problems of global agriculture They decrease productivity and are a setback for the management and harvest of the given culture, which leads to an annual loss of approximately U$95 billion (FAO 2009). The possibility of combating weed plants using allelochemicals is widely recognized (Rice 1984; Durán-Serantes et al 2002; Ribeiro et al 2009; Matsumoto et al 2010). These secondary metabolism products possess several advantages over traditional herbicides, such as their biodegradability, Valquiria Marin Voltarelli, Jose Pedro Nepomuceno Ribeiro and Maria Inês Salgueiro Lima water solubility, and shorter half-life. Allelochemicals have a less specific action mechanism, so they are less likely to select resistant biotypes (Reigosa et al 2001; Durán-Serantes et al 2002)

Objectives
Methods
Results
Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.