dc.contributor.author | Siti Shuhada Azahari | |
dc.date.accessioned | 2018-11-22T02:54:08Z | |
dc.date.available | 2018-11-22T02:54:08Z | |
dc.date.issued | 2007 | |
dc.identifier.uri | http://umt-ir.umt.edu.my:8080/xmlui/handle/123456789/10583 | |
dc.description.abstract | A study was conducted to determine acute and chronic effects of herbicidecyhalofop butyl on the survival and reproduction rate of Moina macrocopa in a laboratory study. It is found that cyhalofop butyl concentrations that cause 50% mortality (LC50) after exposure for 24 and 48-h were 1.91 and 0.34 mgL-1, respectively. While non-observable effect concentration (NOEC) was found to be 0.8 μgL-1• Moina macrocopa exhibited 100% mortality at day 14 and day 12 after being exposed to cyhalofop butyl at 0.4 μgL-1 and 8 μgL-1, respectively. Reproduction rate was greatly reduced by about 41.2% at 0.4 μgL-1 while approximately 60% at 8 μgL- 1 as compared to control organisms throughout 14 days. If environment concentration of cyhalofop butyl is controlled and does not exceed 0.4 μgL-1 application of this herbicide is unlikely to cause adverse effect on this cladoceran population in aquatic agroecosytem. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Universiti Malaysia Terengganu | en_US |
dc.subject | LP 33 FASM 1 2007 | en_US |
dc.subject | Siti Shuhada Azahari | en_US |
dc.title | Effects of herbicide-cyhalofop butly on survival and reproduction rates of freshwater cladoceran Moina macrocopa | en_US |
dc.type | Working Paper | en_US |