Abstract
The combined effect of Vitashield 40EC (chlorpyrifos ethyl-CPF) and Bassa 50EC (fenobucarb-F) was compared with the effects from exposure to the two pesticides separately, by measuring the brain acetylcholinesterase (AChE) activity in climbing perch fingerlings (Anabas testudineus). The experiment was conducted under controlled laboratory conditions and included three treatments containing 0.173 mg/L of CPF, 1.137 mg/L of F, 0.173 mg/L of CPF + 1.137 mg/L of F (M), and a control. The inhibition of the brain AChE activity in fish exposed to F was weaker and shorter than in fish exposed to CPF. The inhibition by the mixture of CPF and F was significantly lower and less prolonged than the inhibition by only CPF but significantly higher than the inhibition by only F.
Highlights
The Mekong Delta covers an area of about 40 thousand square kilometers accounting for approximately 12.2% of the total Vietnam area, and provides more than 50% of the total rice production of the country (Huy 2011; Berg et al 2016)
The DO levels during days 5 and 7 in all treatments were significantly higher than the DO levels at days 1 and 3, which indicate a reduced respiration and stress of the fish exposed to chlorpyrifos ethyl (CPF) and F towards the end of the experiment
This study shows that the applications of organophosphate and carbamate insecticides, such as CPF and F, impact negatively on native fish species, such as climbing perch
Summary
The Mekong Delta covers an area of about 40 thousand square kilometers accounting for approximately 12.2% of the total Vietnam area, and provides more than 50% of the total rice production of the country (Huy 2011; Berg et al 2016). The increased use of pesticides has helped to increase the rice yields, it has been followed by an increased risk for negative effects on the environment and on people’s health (Berg et al 2012; Sebesvari et al 2012). Dasgupta et al (2007), Ky and Ngoc (1998), and Thuy et al (2003) indicated that the use of pesticides in the Mekong Delta can cause adverse impacts on human health, including skin and eye irritation, headache, dizziness, and shortness of breath. Several other studies found negative impacts of pesticides on human health in the North of Vietnam (Ky and Ngoc 1998; Murphy et al 2002; Phung et al 2012a, b, 2013). The combination of different pesticides could potentially result in Bcocktail^ effects on aquatic organisms in the rice
Sign-in/Register to view highlights & summary 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.
