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  <controlfield tag="008">210402s9999    xx            000 0 und d</controlfield>
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   <subfield code="a">Mai, Hoàng Xuyên</subfield>
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  <datafield tag="245" ind1=" " ind2="0">
   <subfield code="a">Tình hình gây hại và hiệu quả của một số chất quấy rối đối với sâu kéo màng (Hellula undalis fabricius) hại cải :</subfield>
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   <subfield code="b">Luận văn tốt nghiệp Cao học. Chuyên ngành Bảo vệ thực vật</subfield>
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  <datafield tag="245" ind1=" " ind2="0">
   <subfield code="c">Mai Hoàng Xuyên ; Lê Văn Vàng (Cán bộ hướng dẫn)</subfield>
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   <subfield code="a">Cần Thơ</subfield>
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   <subfield code="a">Đề tài nghiên cứu nhằm đánh giá hiệu quả của một số hóa chất tìn hiệu đối với sự gây hại của sâu kéo màng từ đó cung cấp cơ sở cho việc ứng dụng trong chiến lược quản lý tổng hợp đối tượng gây hại này ở ĐBSCL.</subfield>
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   <subfield code="b">nthai</subfield>
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