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Evaluation of the Genotoxicity of Polymeric Microparticles Containing ametryn Herbicide

Journal of Environmental Science and Engineering(A) 2012年第4期1卷 553-565页

作者： Renata de Lima Leandro O. Feitosa Renato Grillo Anderson E.S. Pereira Leonardo FernandesFraceto Department of Biotechnology University of Sorocaba Sorocaba 18023-000 Brazil Federal University of Sao Carlos Sorocaba 18052-780 Brazil Department of Environmental Engineering UNESP-Univ. Estadual Paulista Sorocaba 18087-180 Brazil Department of Biochemistry Institute of Biology UNICAMP Campinas 18083-862 Brazil

Agrochemicals have been used throughout the ages to eradicate weeds and pests. Use of agrochemicals is now commonplace, serving as an aid in farming procedures and contributing to greater agricultural production. However, the indiscriminate use of agrochemicals is a cause for concern because they can exert toxic effects on the environment and hence on living beings. This work involved a genotoxic analysis of controlled release formulations of the herbicide ametryn encapsulated in microspheres of poly（hydroxybutyrate） and poly（hydroxybutyrate-co^valerate）. Genotoxicity was analyzed using cytogenetic, micronucleus, comet and Allium cepa assays, as well as molecular analysis. The results showed that the rate of chromosome breakdown caused by unencapsulated ametryn was much higher than that caused by ametryn encapsulated in the polymer microspheres （p 〈 0.05）. This indicates that controlled release delivery systems employing the polymer formulations should be significantly safer for the environment and for living beings.

关键词： ametryn controlled release environmental chemistry genotoxicity.

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Residue Analysis of 55% MCPA·ametryn·diuron WP

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Plant Diseases and Pests 2014年第1期5卷 35-38页

作者： Yang Lang Liang Xueqiang Huang Lifei Wang Weilan Xu Hongkuan Wu Hongguo Huang Jing Institute of Plant Protection Guangxi Academy of Agricultural Sciences Guangxi Key Laboratory of Biology of Crop Pests and Diseases Environmental Protection Branch of Nanning High-tech Industrial Development Zone Guangxi Huifeng Biotechnology Co. Ltd.

The digestion regularity of MCPA, ametryn and dim＇on which were the active ingredients of 55% MCPA · ametryn · diuron WP in sugarcane leaves and soil of sugarcane plantation collected from Changsha of Hunan Province and Haikou of Hainan Province in 2009 and 2010were studied in the paper, and the results showed that these three agents had rapid digestion. The final residue test showed that beth MCPA and ametryn had not been detected in the study; the average resi- dues of diuron in the soil collected from Hunan Province in 2009 and 2010 were 0.018 and 0.015 mg/kg, respectively which were slightly larger than the critical value of 0. 013mg,/kg; diuron had no been detected in other treatments.

关键词： 55% MCPA ametryn diuron WP Residue analysis Half-life

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Screening of Commercial Herbicides for Controlling Algae Growth in Aquarium

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Journal of Agricultural Science and Technology(B) 2013年第1期3卷 10-16页

作者： Chuah Tse Sengt Noor Hafiul Bin Wahad Liew Hong Jung Department of Agro-technology Faculty of Agro-technology and Food Science University of Malaysia Terengganu 20130 KualaTerengganu Terengganu Malaysia Department of Fisheries Science and Aquaculture Faculty of Fisheries and Aqua Industry University of Malaysia TerengganuKuala Terengganu Terengganu 20130 Malaysia Institute of Tropical Aquaculture University of Malaysia Terengganu 20130 Kuala Terengganu Terengganu Malaysia

This study was conducted to screen the commercial herbicides for algae control in the aquarium. Three herbicides of ametryn, atrazine and metribuzine were tested at concentrations ranging from 0.625 to 10.00 ppm. It is found that ametryn was the most effective herbicide that inhibited algal growth. ametryn concentration that caused 50% inhibition on algae growth after exposure for 21 days was 0.335 ppm. Survival rate of oruamental fish, Harlequin rasbora （Trigonostigma heteromorpha） and growth rate of aquatic plant （Elodea canadensis） exposed to 10 ppm ametryn were compared with those exposed to algaecide. The result showed that there was no significant difference in survival rate of Harlequin rasbora when exposed to ametryn, algaecide and dechlorinized tap water （control）. However, growth rate of E. canadensis was lower after exposure of ametryn compared to those exposed to algaecide and tap water. These results suggest that ametryn has potential to be used as an algal inhibitor in aquarium.

关键词： ametryn Elodea canadensis ornamental fish Trigonostigma heteromorpha

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