Browsing by Author "Bo, Aung Bo"

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    Growth Response of Weed Species in a Paddy Field under Elevated Temperatures
    (Department of crop science, Chungnam National University, Daejeon 34134, Korea, 2018) Bir, Md. Shahidul Haque; Hien, Le Thi; Won, Ok Jae; Bo, Aung Bo; Ruziev, Farrukh; Umurzokov, Mirjalol; Jia, WeiQiang; Yun, Hye Jin; Khaitov, Botir; Park, Woong
    The present study aimed to investigate the growth response of rice and paddy weeds under varying temperatures created artificially in the phytotron under field condition. Rice (Oryza sativa L.), three annual (Ludwigia prostrata, Monochoria vaginalis, and Echinochloa oryzicola) and three perennial (Scirpus planiculmis, Eleocharis kuroguwai, and Sagittaria sagittifolia) paddy weeds were grown under different temperature regimes (ambient, ambient+0.8°C, ambient+1.9°C, and ambient+3.4°C). It was observed that the growth of both rice and paddy weed species increased with the elevation of temperature. However, the growth of weeds was much greater than that of rice under elevated temperature. The shoot dry weight of rice was 8.9%, 13.1%, and 30.4% greater at the ambient+0.8, +1.9 and +3.4℃, respectively compared to the ambient temperature. Among the paddy weed species, L. prostrate exhibited the most significant increased level of both dry weight and leaf area presenting 211.8% and 214.3% higher, respectively at the ambient+3.4℃ than that of the ambient temperature. Growth of E. oryzicola and M. vaginalis were slightly higher compared to the growth of rice under elevated temperature. The growth of perennial weed species of S. sagittifolia exhibited 124.8% higher dry weight at the ambient+3.4℃ than at the ambient. Our findings suggest that elevation temperatures might provide an even greater competitive advantage to weeds with concomitant negative effects on rice productio
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    Probabilistic exposure assessment, a risk based sampling plan and food safety performance evaluation of common vegetables (tomato and brinjal) in Bangladesh
    (Korean Journal of Agricultural Science, 2021) Mazumder, Mohammad Nurun-Nabi; Bo, Aung Bo; Shin, Seung Chul; Jacxsens, Liesbeth; Akter, Tahmina; Bir, Md. Shahidul Haque; Aktar, Most Mohshina; Rahman, Md. Habibur; WeiQiang, Jia; Park, Kee Woong
    Along with the widespread use of pesticides in the world, concerns over human health impacts are rapidly growing. There is a large body of evidence on the relationship between the exposure to pesticides and the elevated rate of chronic diseases such as different types of cancers, diabetes, neurodegenerative disorders like Parkinson, Alzheimer, and amyotrophic lateral sclerosis (ALS), birth defects, and reproductive disorders. This research assessed the health risk of pesticide residues by the dietary intake of vegetables collected from the agro based markets of Dhaka, Bangladesh. As some of the banned pesticides were also found in vegetable samples, they may pose a higher risk because of cheaper availability and hence the government of Bangladesh should take strong measures to control these banned pesticides. Five organo phosphorus (chlorpyrifos, parathion, ethion, acephate, fenthion) and two carbamate (carbaryl and carbofuran) pesticide residues were identified in twenty four samples of two common vegetables (tomato and brinjal). The pesticide residues ranged from below a detectable limit (< 0.01) to 0.36 mg·kg-1. Acephate, chlorpyrifos, ethion, and carbaryl were detected in only one sample, while co-occurrence occurred twice for parathion. Continuous monitoring and strict regulation should be enforced regarding the control of pesticide residues in fresh vegetables and other food commodities in Bangladesh.