title: Efficacy of Bt maize producing the Cry1Ac protein against two important pests of corn in China.
abstract: Ostrinia furnacalis (Guenée) and Helicoverpa armigera (Hübner) are the most important pests of maize in China. A laboratory study and a 2-year field study on the efficacy of transgenic maize expressing the Cry1Ac protein BT38 against O. furnacalis and H. armigera were performed. We found that the husks, kernels, and silks of BT38 showed significant efficacy against larvae of O. furnacalis and H. armigera. In the field, when neonate larvae of O. furnacalis and H. armigera were on plants at different growth stages and when levels of leaf-damage or number of damaged silks were used to score efficacy, we found that BT38 showed significant insecticidal efficacy against O. furnacalis and H. armigera, but the non-Bt maize did not show significant efficacy against either pest. These results suggest that the insecticidal efficacy of Bt maize expressing the Cry1Ac protein could be useful in the integrated pest management of these key maize pests.
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Hong-Xing
authors: HX
authors: Chen
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Rui
authors: R
authors: Yang
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Wang
authors: W
authors: Yang
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Liu
authors: L
authors: Zhang
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Ibrahima
authors: I
authors: Camara
authors: Department of Entomology, China Agricultural University, Beijing, China.
authors: Xue-Hui
authors: XH
authors: Dong
authors: Collaborative Innovation Center of Special Plant Industry, Chongqing University of Arts and Sciences, Chongqing, 402160, China. liung906@163.com.
authors: Yi -Qing
authors: Y-
authors: Liu
authors: Department of Entomology, China Agricultural University, Beijing, China. wpshi@cau.edu.cn.|Collaborative Innovation Center of Special Plant Industry, Chongqing University of Arts and Sciences, Chongqing, 402160, China. wpshi@cau.edu.cn.
authors: Wang-Peng
authors: WP
authors: Shi
mesh_terms: D000818:Animals; D001413:Bacillus thuringiensis / Q000235:genetics* / Q000378:metabolism; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D002681:China; D004731:Endotoxins / Q000235:genetics* / Q000378:metabolism; D006460:Hemolysin Proteins / Q000235:genetics* / Q000378:metabolism; D007814:Larva / Q000187:drug effects / Q000502:physiology; D009036:Moths / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D010572:Pest Control, Biological; D030821:Plants, Genetically Modified / Q000235:genetics / Q000502:physiology; D003313:Zea mays / Q000235:genetics / Q000502:physiology*
chemical_list: D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D004731:Endotoxins; D006460:Hemolysin Proteins; C030956:insecticidal crystal protein, Bacillus Thuringiensis
keywords: Bt maize; Helicoverpa armigera; Insecticidal efficacy; Ostrinia furnacalis