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Control of Annual Bluegrass(Poa annua L.) by Bispyribac-sodium  

Park, Nam-Il (Korea Turfgrass Research Institute)
Lee, In-Yong (National Institute of Agricultural Science and Technology, RDA)
Park, Jae-Eup (National Institute of Agricultural Science and Technology, RDA)
Kim, Ho-Jun (Korea Turfgrass Research Institute)
Chun, Jae-Chul (College of Agriculture & Life Sciences, Jeonbuk National University)
Ogasawara, Masaru (Center for Research on Wild Plants, Utsunomiya University)
Publication Information
Asian Journal of Turfgrass Science / v.20, no.2, 2006 , pp. 157-165 More about this Journal
Abstract
This study was initiated to investigate herbicidal selectivity margin with annual bluegrass and bentgrass according to growth stages through herbicidal spectrum of bispyribac-sodium and therefore to examine application possibility to prevent annual bluegrass selectively. The herbicidal efncacy by pre-emergence application was generally low. But a high herbicidal efficacy was observed over 90% for Shehpherd's purse. Foliar treatment resulted in a higher herbicidal efficacy in all tested plants except dallisgrass, lovegrass, curled dock and bentgrass as compared with pre-emergence application. We found bispyribac-sodium could be used as a selective weeding chemical between annual bluegrass and bentgrass. In regard to dose-responses to the growth stage, annual bluegrass was more susceptible to bispyribac-sodium than bentgrass for the same dosage. Particularly, bispyribac-sodium application in inflorescence emergence stage showed a greater herbicidal selectivity margin of 6.8 times with annual bluegrass over creeping bentgrass after 28 days from the application. These data demonstrated that annual bluegrass was more sensitive to bispyribac-sodium over creeping bentgrass.
Keywords
annual bluegrass; bispyribac-sodium; herbicidal selectivity; herbicidal spectrum;
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Times Cited By KSCI : 1  (Citation Analysis)
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