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Transgenic crops that produce insecticidal toxins have a great potential for controlling target pest insects, but there is a growing concern about unintended influences on non-target species. In the present study, the preferences and performance of non -targetgreen peach aphid, Myzus persicae (Sulzer), on transgenic cabbages ( Brassica oleracea ) that produce Bt toxin (Cry1Ac1) and untransforme dcontrol plants were investigated as a part of risk assessment. In a free-choice situation, the number of nymphs larviposited by 10 winge dadults over 3 days was 21.9±1.8 and 22. 5±2.2 on transgenic and the control plants, respectively, indicating that the aphids did not discriminate between the two types of plants. In a performance assay, the development time (D) and intrinsic rate of increase (r m ) of wingless aphids reared on transgenic and control plants were also similar (D, 5.8±0.2 and 5.9±0.1 (days) and r m , 0.7±0.1 and 0.8±0.1,for transgenic and control plants, respectively). These results suggest that M. persicae is not significantly affected by transgenic Bt cabbage. Key words: Environmental risk assessment, Bt cabbage, Host preference, Myzus persicae, Transgenic crop :                 ,                      .      Bt (Cry1Ac1)             . ,   Bt     10  (alate virginoparae) ,  (reproduction)        , Bt        21.9±1.8 22.5±2.2 . ,    (apterous virginoparae) Bt        ,      Bt     5.8±0.2, 5.9±0.1 (day)    ,  (r

han-guk eung-yong gonchung hakoeji/han'gug eung'yong goncung haghoeji

Effects of Bt Cabbage (Brassica oleracea) on the Host Preference and Performance of the Green Peach Aphid, Myzus persicae Sulzer (Hemiptera: Aphididae)