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Evaluation of the impact of dyke on the practice of using plant protection chemicals and the environment impact quotation index of rice cultivation areas in Thap Muoi, Dong Thap province

This report presents the result of a survey to evaluate the use of crop protection chemicals (pesticides – HCBVTV) in rice-growing areas with dyke, semi-dyke and no embankment based on interview result with 112 interviewers such as farmers, agricultural specialists, and pesticide dealers in Thap Muoi District, Dong Thap Province and pesticide usage data recorded by three selected framers in 3 different dyke systems. | Journal of Science and Technology 54 (4B) (2016) 56-63 EVALUATION OF THE IMPACT OF DYKE ON THE PRACTICE OF USING PLANT PROTECTION CHEMICALS AND THE ENVIRONMENT IMPACT QUOTATION INDEX OF RICE CULTIVATION AREAS IN THAP MUOI, DONG THAP PROVINCE Nguyen Thi Van Ha1, *, Nguyen Thi Quynh Trang1, Le Huynh Manh Tung2, Tran Thanh3 1 Ho Chi Minh City University of Natural Resource and Environment, 236 B Le Van Sy , Tan Binh District, HoChiMinh City 2 Ho Chi Minh City University of Technology, 268 Ly Thuong Kiet, District 10, HCM City 3 Nguyen Tat Thanh University, 300 A Nguyen Tat Thanh, District 4, HCM City * Email: ntvha@hcmunre.edu.vn Received: 15 August 2016; Accepted for publication: 10 November 2016 ABSTRACT This report presents the result of a survey to evaluate the use of crop protection chemicals (pesticides – HCBVTV) in rice-growing areas with dyke, semi-dyke and no embankment based on interview result with 112 interviewers such as farmers, agricultural specialists, and pesticide dealers in Thap Muoi District, Dong Thap Province and pesticide usage data recorded by three selected framers in 3 different dyke systems. It showed that dyke practice affects the use of pesticides of farmers. After dykes constructed, the pesticides used were more diverse, with higher dosage compared to before having embankments. The report also evaluates the risk of using pesticides through Environmental Impact Quotient (EIQ) index. It showed that areas with dyke and semi-dyke have much higher EIQ index than areas without embankment, 167, 145 and 54, respectively. Keywords: dyke, environmental impact quotient, pesticide, non- embankment, Vietnam. 1. BACKGROUNDS Dong Thap is a province located in the Southwest region of Vietnam, Mekong Delta. Thanks to its tropical climate and fertile land with alluvial from Tien and Hau River, Dong Thap is able to produce a lot of food and many agricultural and aquatic products with high export value, becoming the national granary. However, due to .