Abstract
With the aim of estimating the persistence of imazaquin and imazethapyr soil biological activity in a dark red latosol in Maringa, PR, Brazil, experiments were carried out in two different seasons of the year (winter/spring - from July to October, 1999, and spring/summer - from December 1999, to March, 2000). The herbicides were applied at 150 and 600 g/ha, and soil samples from 0-2 cm depth were collected from herbicide-treated plots an no-herbicide check up to 91 days after application (DAA). In greenhouse, bioassays using cucumber and sorghum as test-species were carried out, sowing these two species in soil samples collected from the experimental field. Results obtained allowed to conclude that imazaquin displayed a longer soil residual effect, and that higher rates (600 g/ha) of both herbicides provided longer periods of persistence, despite the season of application. The inhibition percentage of biomass production in samples from spring/summer herbicide-treated soil decreased faster, when compared with winter/spring application. Cucumber was more sensitive than sorghum as bioindicator of imazaquin and imazethapyr soil biological activity
Sign-in/Register to access full text options 
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 callDisclaimer: 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.
